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dinnerplate
08-02-2010, 5:45 PM
i'm trying to have a muzzle brake installed on my saiga 7.62. for some reason, i can't find a single gunsmith that is willing to work on this. i've tried ammo bros, martin b. retting, bain and davis, and even riflegear (their AK no longer works there).

i'm in the socal area. does anyone know a smith close by that knows how to install a muzzle brake? that is also willing to do it? i'd do it myself, but this part seems like i should leave it to a pro. thanks in advance.

gregshin
08-02-2010, 7:16 PM
Try enterprise arms

WokMaster1
08-02-2010, 7:50 PM
PM Randall (AR15barrels)

Pryde
08-02-2010, 8:01 PM
Try Entreprise.
I don't think Randal has the proper fixture to thread a AK barrel.

SJgunguy24
08-02-2010, 9:39 PM
Thats a pretty easy job, but the barrel needs to be turned down a little or the die won't go on the barrel. Randall should be able to 4 jaw that and cut the threads with a single point.

Oh AR15barrels is Randall.

ar15barrels
08-02-2010, 10:26 PM
I'll thread ANY type barrel that's brought to me, as long as it's an inch pattern thread that's desired.
I don't have a press to remove AK barrels though so you need to bring me ONLY the barrel in order for me to do the threading.
All the hardware such as gas blocks, trunions and sights need to be removed.

glockwise2000
08-02-2010, 10:28 PM
Randall will do the job.

SJgunguy24
08-02-2010, 10:42 PM
I'll thread ANY type barrel that's brought to me, as long as it's an inch pattern thread that's desired.
I don't have a press to remove AK barrels though so you need to bring me ONLY the barrel in order for me to do the threading.
All the hardware such as gas blocks, trunions and sights need to be removed.

Well, there you have it.

dinnerplate
08-03-2010, 3:00 PM
sounds like randall is the man for the job. the problem is that my muzzle brake and gas piston look like they're welded on. so i can't remove any of them for threading. does anyone know how to pull it off if it's welded on like the pics below?

http://i247.photobucket.com/albums/gg138/dinnerplate79/Saiga%20Muzzle%20Brake/1.jpg
http://i247.photobucket.com/albums/gg138/dinnerplate79/Saiga%20Muzzle%20Brake/4.jpg
http://i247.photobucket.com/albums/gg138/dinnerplate79/Saiga%20Muzzle%20Brake/5.jpg
http://i247.photobucket.com/albums/gg138/dinnerplate79/Saiga%20Muzzle%20Brake/6.jpg
http://i247.photobucket.com/albums/gg138/dinnerplate79/Saiga%20Muzzle%20Brake/7.jpg

CSACANNONEER
08-03-2010, 3:08 PM
Looks like they are pinned on to me. Also, your barrel may already be threaded. I can't tell from the pics but, it might have a thread protector soldered over the threads. We can always strip the barrel down for you at an AK build party. If you want to make the drive to my place, let me know.

dinnerplate
08-03-2010, 3:21 PM
if they are pinned, i can't tell. they look like smooth dimples without any outlines. it also looks like there aren't any weld lines or anything around the FSB. can this still come off?

SJgunguy24
08-03-2010, 3:28 PM
Not welded, but dimpled. There are dimples machined into the barrel and the FSB and GB are pressed on and dimpled to lock them in. You drill those out and press off as normal. The piston is riveted, that needs to be drilled out to remove.
If you don't need to the piston for 922r I'd leave it alone. They can be a major PITA and are good for snapping a couple of bits while doing the job.

dinnerplate
08-03-2010, 3:31 PM
i'm a little new to this. i think i get that they pressed it ON, but how would i press if off? what kind of press do i need? thanks again.

SJgunguy24
08-03-2010, 3:42 PM
i'm a little new to this. i think i get that they pressed it ON, but how would i press if off? what kind of press do i need? thanks again.

Shop press 10 ton or larger.

Drill out the dimples, don't go to far you don't want to get into the barrel.

http://i285.photobucket.com/albums/ll66/SJgunguy24/140.jpg


Dimples drilled.

http://i285.photobucket.com/albums/ll66/SJgunguy24/141.jpg


Brass, aluminum, or copper slug to protect the crown, make sure the OD is smaller then the OD of the barrel.
Gear puller plates hold the FSB steady and press away.


http://i285.photobucket.com/albums/ll66/SJgunguy24/142.jpg



Slight clean up maybe necessary but nothing too bad.

http://i285.photobucket.com/albums/ll66/SJgunguy24/143.jpg

dinnerplate
08-03-2010, 3:52 PM
holy moly. i can't seem to find any presses like that in my apartment at the moment...hahaha...

this looks like a special job then. do i go to OSH or home depot? doubt they'd be happy about an AK in their store.

what if i were to cut only the front part of the shroud off and thread only that portion of the barrel that's exposed, like this guy:

http://forum.saiga-12.com/index.php?showtopic=53105&st=0&p=501282&hl=remove%20fsb&fromsearch=1&#entry501282

SJgunguy24
08-03-2010, 4:13 PM
Your going to need a lathe to turn the barrel down a bit so a die will fit. You can use a dremel but risk cutting the barrel. Do you have an AKM sight to replace that with? Any brake you install will need a retainer pin unless you go with a peel washer to index properly.

dinnerplate
08-03-2010, 4:21 PM
hmm. i don't have any sights right now to replace the original. i'll buy that and the peel washer as needed.

my plan of attack is this:

1) drill, cut, and remove FSB, GB, and anything else attached to the barrel
2) get a metric thread die (since the tapco ak-74 MB is metric threaded)
3) have the barrel threaded on a lathe
4) buy FSB and GB. buy pins to put them back on. (no press needed?)
5) put everything back together

since i've never done this, a calguns member has generously offered to help with he first two steps. i was then going to take it and the metric die to randall for threading. sound like a plan?

Matt@EntrepriseArms
08-03-2010, 4:33 PM
Try Entreprise.
I don't think Randal has the proper fixture to thread a AK barrel.

We weren't able to help out dinnerplate much - hopefully someone else here can get it done for him the right way.

dinnerplate
08-03-2010, 6:10 PM
i've used a pipe cutter to cut off some of the shroud. the barrel is, unfortunately, not threaded.

http://i247.photobucket.com/albums/gg138/dinnerplate79/Saiga%20Muzzle%20Brake/8.jpg

i'm now thinking of slicing the FSB altogether along the left and right sides of the barrel, so that i can just split it off. bad idea?

SJgunguy24
08-03-2010, 7:42 PM
i've used a pipe cutter to cut off some of the shroud. the barrel is, unfortunately, not threaded.

http://i247.photobucket.com/albums/gg138/dinnerplate79/Saiga%20Muzzle%20Brake/8.jpg

i'm now thinking of slicing the FSB altogether along the left and right sides of the barrel, so that i can just split it off. bad idea?

Do you have an AKM to replace it with? Or if you wanted you could go with HK style sights. The front would need to be welded to the gas block. Can you weld or know somebody who does weld?

dinnerplate
08-03-2010, 8:17 PM
this is one of those times where i truly wish i listened or just waited. i've cut into my barrel far too much to use it:

http://i247.photobucket.com/albums/gg138/dinnerplate79/Saiga%20Muzzle%20Brake/12.jpg
http://i247.photobucket.com/albums/gg138/dinnerplate79/Saiga%20Muzzle%20Brake/12.jpg

that's not the shroud that's exposed - that's the barrel. screwed. so now it's time to go out and get a new barrel. the bright side is that i can now pick out a pre-threaded one. does anyone know where to get one that will fit with this saiga? i found this site that carries several:

http://www.armsofamerica.com/barrels.html

anyone have an idea which might work best? thanks.

SJgunguy24
08-03-2010, 8:25 PM
Your not screwed, you just didn't heed the warnings somebody was trying to give you.
What I would do is press off that sight, find an AKM style or maybe even an AK 74 type. The 74 type will have threads on it alread, the AKM will replace the front sight you have and will have the dedent to capture the new brake that will attach to the threads you will have cut into your barrel.
Please think of this as a lesson learned, and read my sig line. Be smart.

dinnerplate
08-03-2010, 8:45 PM
no kidding. i'm not going to mess around with the pressed stuff, and gonna have it professionally done. entreprise said they couldn't do the AKs with the pressed/dimpled parts, so i'll have to send it somewhere else.

is there anyone local that could replace a barrel and assemble the FSB and GB? keep in mind this is a pressed saiga. i'd of course pay you for your time. otherwise, i'll have to go to an out of state shop, like kreb's custom.

SJgunguy24
08-03-2010, 8:52 PM
no kidding. i'm not going to mess around with the pressed stuff, and gonna have it professionally done. entreprise said they couldn't do the AKs with the pressed/dimpled parts, so i'll have to send it somewhere else.

is there anyone local that could replace a barrel and assemble the FSB and GB? keep in mind this is a pressed saiga. i'd of course pay you for your time. otherwise, i'll have to go to an out of state shop, like kreb's custom.

What is "local?" You nothing for your location, it helps if you have something on there. I'm in San Jose but don't have access to the equipment that I did a couple weeks ago. But I could get that sight off and get a new one on.

dinnerplate
08-03-2010, 9:39 PM
my apologies. i'm in los angeles. i tried fixing the profile, but couldn't find location.

i think i'm going to purchase a US made AKM barrel, provided it works with my saiga:

http://aa-ok.com/akm-barrel-7-62-x-39-new-made-in-usa-hard-chromed.html

i want to do it myself, but i'm afraid of messing it up even more, and taking the barrel off looks like an absolute beast. i'm looking up out of state gunsmiths, but would much prefer to get this taken care of this week. any takers? i'll pay for your time.

SJgunguy24
08-03-2010, 10:13 PM
my apologies. i'm in los angeles. i tried fixing the profile, but couldn't find location.

i think i'm going to purchase a US made AKM barrel, provided it works with my saiga:

http://aa-ok.com/akm-barrel-7-62-x-39-new-made-in-usa-hard-chromed.html

i want to do it myself, but i'm afraid of messing it up even more, and taking the barrel off looks like an absolute beast. i'm looking up out of state gunsmiths, but would much prefer to get this taken care of this week. any takers? i'll pay for your time.

AKM barrel journal is 23mm and Saiga's are 22MM IIRC

ar15barrels
08-03-2010, 10:31 PM
AKM barrel journal is 23mm and Saiga's are 22MM IIRC

Yeah, a 10 ton press is not going to work for that.
I know a 60 ton will do it though!

ar15barrels
08-03-2010, 10:35 PM
this is one of those times where i truly wish i listened or just waited. i've cut into my barrel far too much to use it:

http://i247.photobucket.com/albums/gg138/dinnerplate79/Saiga%20Muzzle%20Brake/12.jpg
http://i247.photobucket.com/albums/gg138/dinnerplate79/Saiga%20Muzzle%20Brake/12.jpg

that's not the shroud that's exposed - that's the barrel. screwed. so now it's time to go out and get a new barrel. the bright side is that i can now pick out a pre-threaded one. does anyone know where to get one that will fit with this saiga? i found this site that carries several:

http://www.armsofamerica.com/barrels.html

anyone have an idea which might work best? thanks.

So you are going to go from simple threading job to a full on virgin barrel build.
You are in for what's called "a learning experience".
I suggest you want for the next build party before you proceed.

dinnerplate
08-04-2010, 12:18 AM
haha, alright. good thing that was pointed out. i don't think i can afford very many more "learning experiences." i'm actually going to send it off for service, because i don't think i can do this with any confidence.

i've heard of build parties on calguns. when do they occur, and where?

CSACANNONEER
08-04-2010, 5:33 AM
Can't we just use a dinzag threading kit and salvage the barrel? If so, do we even need to remove the FSB? Anyone got a threading kit that we can use either before Sept 3-4 or during my reweld party? I just got a PM from another member who is looking at doing the same thing. I don't think that having a couple people threading barrel would take anything away from the reweld party. SJgunguy24, what do you think about it?

SJgunguy24
08-04-2010, 8:04 AM
Can't we just use a dinzag threading kit and salvage the barrel? If so, do we even need to remove the FSB? Anyone got a threading kit that we can use either before Sept 3-4 or during my reweld party? I just got a PM from another member who is looking at doing the same thing. I don't think that having a couple people threading barrel would take anything away from the reweld party. SJgunguy24, what do you think about it?

It takes all of 10 minutes to thread the barrel. I just wonder how close the barrels are to 14mm. IIRC most of the 7.62 barrels are 14mm+. I had to turn all of them down just a little bit or the die wouldn't start. There's gonna be enough people just hanging out if somebody needs a hand the help is there.

I want to see a picture of that barrel from the top side. How far did he get into the barrel itself, that might have to be cut off and a permenent extension installed. Or maybe a AK74 front sight, that will support that all the way to the muzzle.

motorhead
08-04-2010, 8:28 AM
hate to be the harbinger of doom but i truly hope you didn't create an sbr in the process. you could probably recrown and use a 23mm fsb. at this point i would avoid diy if i were you.

CSACANNONEER
08-04-2010, 10:01 AM
It takes all of 10 minutes to thread the barrel. I just wonder how close the barrels are to 14mm. IIRC most of the 7.62 barrels are 14mm+. I had to turn all of them down just a little bit or the die wouldn't start. There's gonna be enough people just hanging out if somebody needs a hand the help is there.

I want to see a picture of that barrel from the top side. How far did he get into the barrel itself, that might have to be cut off and a permenent extension installed. Or maybe a AK74 front sight, that will support that all the way to the muzzle.

I'm hoping that we don't have to turn the barrel down. However, if it is required dinzag offers a way to do it while still in the receiver! http://www.dinzagarms.com/tools/mcp.html I'm hoping that someone local has a threading kit for us to borrow just to see if it'll work.

Also, another member PMed me about doing the same thing. Maybe, both dinnerplate and he can come to the reweld party and get some help?

Dinnerplate, I suggest holding off on buying a new barrel until we can determine if your's will still work well. Also, installing a new barrel is going to require head spacing, etc. I do have two 12T presses and a drill press at my place. We would need a few speacial things like go and nogo gauges, a drill bit to drill the gas port, etc. But, don't worry, we can always find someone to borrow those from.

dinnerplate
08-04-2010, 10:03 AM
SJgunguy, there are two photos of the barrel cut toward the middle of this thread. i'd guess its deepest groove is about 3mm or so, and 2mm average all around.

motorhead: well, it's not technically a SBR yet, but i dremel a little more, and yeah, that's what it would be. i was thinking that too. why can't i just cut the barrel down and then permanently attach a muzzle brake to fulfill the 16" requirement? maybe that would just cause stability issues.

CSAcannoneer: i'm not buying any barrels yet. just trying to figure out if i should take this to a smith out of state. i'd like it if i could salvage the barrel by cutting then recrowning, but i'm certain i don't want a barrel with even a 1mm cut into it. it's both a function and form thing. so it really comes down to whether it's possible to cut, recrown, and weld the MB on in a quality manner.

i'm hearing several things from different people. some say i should just replace the barrel and not mess around. others say that the barrel is much thinner in other higher pressure areas, so just "repair" and thread the barrel instead.

ar15barrels
08-04-2010, 10:06 AM
I'm hoping that we don't have to turn the barrel down. However, if it is required dinzag offers a way to do it while still in the receiver! http://www.dinzagarms.com/tools/mcp.html

I cringe when I see tools like this being used on guns:

http://www.dinzagarms.com/tools/large/mc3.jpg

SJgunguy24
08-04-2010, 10:19 AM
I cringe when I see tools like this being used on guns:

http://www.dinzagarms.com/tools/large/mc3.jpg

Thats why I learned how to use a lathe. My knowledge is basic but I know when to ask for help and to keep my tools sharp.

Where's the brass bolt recrown pic?

OK, so that 2-3MM, ok so the barrel is a little more then 14mm-4mm=10-7.62=2.38mm. Dude that thing is barely hanging on. Silver solder to fill that gap and AK 74 front sight. That's hack but it'll work.

SJgunguy, there are two photos of the barrel cut toward the middle of this thread. i'd guess its deepest groove is about 3mm or so, and 2mm average all around.

dinnerplate
08-04-2010, 10:40 AM
i'm sure i'm overestimating it, but the deepest part is pretty deep. i won't feel comfortable knowing this is an issue. i'm going to have to replace it, i think.

SJgunguy24
08-04-2010, 11:02 AM
i'm sure i'm overestimating it, but the deepest part is pretty deep. i won't feel comfortable knowing this is an issue. i'm going to have to replace it, i think.

No you don't have to replace it, but you will need to permanently attach a barrel extension of some type.

dinnerplate
08-04-2010, 11:35 AM
if i've cut off about an 1 1/2 inches or so, a Ak-74 style MB should be ok as a permanent barrel extension, right?

CSACANNONEER
08-04-2010, 11:44 AM
if i've cut off about an 1 1/2 inches or so, a Ak-74 style MB should be ok as a permanent barrel extension, right?

First, DO NOT CUT IT OFF while the barrel is still in the receiver! Secondly, you will need a portion of the barrel protruding past the FSB so that you can attach a muzzle brake to it.

dinnerplate
08-04-2010, 11:52 AM
in that case, i'll need to get a new barrel, because the cuts are right where the FSB begins. unless i can move the FSB back, but then it'll be near the GB, etc. etc.

SJgunguy24
08-04-2010, 12:28 PM
in that case, i'll need to get a new barrel, because the cuts are right where the FSB begins. unless i can move the FSB back, but then it'll be near the GB, etc. etc.

Ok, have you read any of my earlier posts? You don't need a new barrel, you need to walk away and leave it alone. Come to the weld build party and I will take care of your FSB. If you seen my replies I give specific directions on how to remove the FSB. I have done that to IIRC 6 rifles. I have converted 15+ Saiga rifles. I know what I'm talking about.

Anything that you use as a barrel extention needs to be pinned and welded, welded all the way around, or must be attached with silver solder that has a melting point above 1200F.
Even if you buy a AKM barrel, the Journal for the Saiga barrel is 22mm, the AKM is 23mm and will need to be turned down on a lathe. If not chop your gun up and sell it to me cheap and start again.

icefire
08-04-2010, 2:41 PM
my apologies. i'm in los angeles. i tried fixing the profile, but couldn't find location.

i think i'm going to purchase a US made AKM barrel, provided it works with my saiga:

http://aa-ok.com/akm-barrel-7-62-x-39-new-made-in-usa-hard-chromed.html

i want to do it myself, but i'm afraid of messing it up even more, and taking the barrel off looks like an absolute beast. i'm looking up out of state gunsmiths, but would much prefer to get this taken care of this week. any takers? i'll pay for your time.

AA-Ok is 'famous' for selling airsoft parts as real AK parts, i'd watch out...they sell RPK sights as real, but they are AIRSOFT pot-metal copies, and they dont warn you. You have to read the v ery small print above the picture when you pull up the part...."Airsoft replica AEG"....

dinnerplate
08-04-2010, 5:22 PM
alright, i misunderstood. i thought a barrel extension meant the MB itself. you're talking about taking a piece of a barrel and welding it onto mine. like this one? http://dpharms.com/2inchbarrelextention-p-36.html

when and where is this weld party? is it the 9/4-9/5 one at CSACannoneer's?

CSACANNONEER
08-04-2010, 7:29 PM
alright, i misunderstood. i thought a barrel extension meant the MB itself. you're talking about taking a piece of a barrel and welding it onto mine. like this one? http://dpharms.com/2inchbarrelextention-p-36.html

when and where is this weld party? is it the 9/4-9/5 one at CSACannoneer's?

Yep, that's the one! If you can make it, let me know and I'll put you on "the list".


SJgunguy24,

Do you have a 14-1 LH die? If so, do you mind helping dinnerplate and one other person thread their barrels?

SJgunguy24
08-04-2010, 9:54 PM
Yep, that's the one! If you can make it, let me know and I'll put you on "the list".


SJgunguy24,

Do you have a 14-1 LH die? If so, do you mind helping dinnerplate and one other person thread their barrels?

Nope, I don't. The shop had all that stuff. Me being po' means I won't be able to buy one either. I don't mind helping him out. I just want to make sure the guy's welding are GTG before turning my attention to something else.

SJgunguy24
08-04-2010, 9:57 PM
alright, i misunderstood. i thought a barrel extension meant the MB itself. you're talking about taking a piece of a barrel and welding it onto mine. like this one? http://dpharms.com/2inchbarrelextention-p-36.html

when and where is this weld party? is it the 9/4-9/5 one at CSACannoneer's?

That will work but I was thinking of a surplus AMD brake. You won't need the part for 922r and you'll only need to add 1", that chunk you cut will have to go. I'll dig out my facing tool to clean that mess up since I don't have a lathe to use.

dinnerplate
08-05-2010, 12:39 AM
a thought: would having a barrel extension affect accuracy? it would only be the final inch or two that's not rifled and whatnot, but even slight variations to the crown are cause for concern. it seems like there might be some disturbance to the projectile's natural trajectory as it goes over the 'seam' of the barrel extension and then down a smooth bore for an inch or two.

or is it that that screwed up inch of barrel is cut off, then a muzzle brake is directly attached to the exposed barrel? seems like that would place the brake right up against the FSB.

ar15barrels
08-05-2010, 7:47 AM
a thought: would having a barrel extension affect accuracy?

Not on an AK.
A gun has to be relatively accurate before small things can matter.

SJgunguy24
08-05-2010, 9:45 AM
a thought: would having a barrel extension affect accuracy? it would only be the final inch or two that's not rifled and whatnot, but even slight variations to the crown are cause for concern. it seems like there might be some disturbance to the projectile's natural trajectory as it goes over the 'seam' of the barrel extension and then down a smooth bore for an inch or two.

or is it that that screwed up inch of barrel is cut off, then a muzzle brake is directly attached to the exposed barrel? seems like that would place the brake right up against the FSB.

What do you think muzzle brakes are attached to in the first place? There is no "seam", when the bullet leaves barrel it passes through the brake and on to the target.

And yes the brake will be next to the FSB. Have you ever looked at an AK? The FSB has a spring and pin that actually keeps the brake locked in place.

You screwed up your own gun. I'm am offering you help to fix your mistake and stay legal.
You don't know me, but I think there is a couple of people here who will vouch for me, I know what I'm talking about. Whether you choose to follow my advice is up to you. If you want me to fix that I will, but then we will do it the way I prescribe.
When you started this thread I told you how to remove the FSB without damaging your barrel, you did it your way and what happened? I have tools that are specificlly for guns, thats what I did for the last 4 months was build guns and gunsmithing work.

Take my advice or not, it's up to you. If you show up to the weld party then I will help you, if not have a good day.

SJgunguy24
08-05-2010, 9:45 AM
Not on an AK.
A gun has to be relatively accurate before small things can matter.

:rolleyes: Geeze

ar15barrels
08-05-2010, 10:12 AM
:rolleyes: Geeze

oh come on, how many times have we heard "it's only an AK"... :rofl2:

thedrickel
08-05-2010, 10:45 AM
Your average CGN'er shooting with iron sights . . . won't really make much difference b/w AR and AK accuracy, IMO.

ar15barrels
08-05-2010, 10:53 AM
Your average CGN'er shooting with iron sights . . . won't really make much difference b/w AR and AK accuracy, IMO.

Exactly.
Nor with a Fal or an M1a.

dinnerplate
08-05-2010, 11:13 AM
haha, ok, ok. it's just that i haven't been shooting guns for very long. absorbing information in that time has largely been scattered and unorganized, so it's difficult to tell if one principle applies from one firearm to another. i was aware the AKs are less accurate, but didn't know about whether that sort of thing would affect it practically speaking. makes sense that it doesn't.

as to SJgunguy: it appears that i've questioned you somehow. if i did, it was completely inadvertent. when things like this happen, the center of my attention and universe becomes this. so i ask a trillion questions and explore all kinds of options before committing to a solution. it's not that i think your solution or expertise is inferior. quite the contrary, i'm relying very heavily on your contributions. i proceeded to mess up my gun because i'm impatient, not because i thought your suggestions weren't reliable. my primary concern rests with whether i'm alright with having a firearm that i messed up, that isn't exactly the way it's supposed to be. it's anal, and i'm trying to reason past it, but it ain't comin' so easy. it's really a matter of making a decision that i can live with. and i have to throw my raging impatience in there too.

that said, i'm still investigating my options, but it's looking like doing the barrel extension is my most prudent choice. i'm certainly not going to try this by myself anymore, but i'm itching to get this down to the range soon. a few people may be able to help, but i'll have to see how their availability is.

C_1
08-05-2010, 12:32 PM
Suggestion; instead of welding on a barrel extension, and tapping that, for a threaded muzzle brake, just weld on a muzzle brake that will bring you to the legal minimum length (16+ inches).

SJgunguy24
08-05-2010, 1:18 PM
http://i247.photobucket.com/albums/gg138/dinnerplate79/Saiga%20Muzzle%20Brake/12.jpg

.



Suggestion; instead of welding on a barrel extension, and tapping that, for a threaded muzzle brake, just weld on a muzzle brake that will bring you to the legal minimum length (16+ inches).

That's what I'm suggesting. The only reason why we need to add any length can be seen above.