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View Full Version : Update: Made a .308 Muzzle brake


CobraRed
09-21-2012, 5:17 PM
Update: Made a .308 this time. For my shooting buddy, CalGuns user BenHa, and his Rem 700 AAC

http://img6.uploadhouse.com/fileuploads/17234/17234309ff07477df9430e4478de08d68b4828d7.jpg

http://img8.uploadhouse.com/fileuploads/17234/17234308f0cb8cb36c1a8a3e520cc8acccf830dd.jpg

http://img8.uploadhouse.com/fileuploads/17234/1723434061656ba5d6e8bd797101495858b28388.jpg

http://img7.uploadhouse.com/fileuploads/17234/17234330f3b0f128e9b2503487c7243b6bdb6e13.jpg

As you can see the face is inset about .1, the tapped 5/8-24 hole/muzzle leads to a .600" hole then to the first chamber, .350" exit and so on. The neck is the same exact size as the barrel Dia and sits flush.

Made from rifle grade 410 stainless. Really needs a black-oxide coating to match at this point.




































Old Post
Can be used for an AR or .22, machined it out of stainless. Have always been surprised at the price of muzzle brakes. I've commented a couple times that it's really not a impossible task for the price. This is by no way a scientific product, but I incorporated a couple ques from one's I've liked.

http://img9.uploadhouse.com/fileuploads/16641/16641201ac1f0c05695beab8b61bf097c4956351.jpg

http://img8.uploadhouse.com/fileuploads/16641/1664119915d61a6e7588c0f14b8a6b60ce3c661a.jpg

http://img4.uploadhouse.com/fileuploads/16641/16641197eec7b7763d190cc6214f44c845aa299f.jpg

http://img1.uploadhouse.com/fileuploads/16641/16641196da81e6eb1cec98cb40d8aa3f5a9785a0.jpg

http://img5.uploadhouse.com/fileuploads/16641/1664119884e20d126576bd02dd0209b0c78db72e.jpg

http://img8.uploadhouse.com/fileuploads/16641/16641200f5cb6ab965df9ecab1a6e2ba3fd62f4f.jpg

rickster1269
09-21-2012, 5:18 PM
Ill take it ;))

CobraRed
09-21-2012, 5:19 PM
Haha, .308 is next.

FiveSeven
09-21-2012, 5:23 PM
Excellent work.:thumbsup:

strokesdmb
09-21-2012, 5:27 PM
Do a 7.62x39 and ill buy!!

sent from my SAMSUNG GALAXY NOTE using Tapatalk

Kerplow
09-21-2012, 5:39 PM
looks good. As soon as I get a mill I'm going to start playing with MB's, myself.

CobraRed
09-21-2012, 5:46 PM
looks good. As soon as I get a mill I'm going to start playing with MB's, myself.

It's the cutters that will run you. Think i used:

Centerdrill
.272 drill for bore
.47 or so drill for ID used for threads
1/2" tap, most 1/2 barrel ends are 1/2-28

Then you need a surface turret to hold and rotate piece on mill.

.109 (could use 1/8", looked big) drill for holes
.25" countersink
.25" drill for guide hole
.625 drill using collet in place of a chuck now
.615 undersized rougher end mill
.625 finish mill

engi
09-21-2012, 5:58 PM
Looks nice. Have you test fired it yet? What were the results?

CobraRed
09-21-2012, 6:01 PM
Looks nice. Have you test fired it yet? What were the results?

Nope, made it today.

mif_slim
09-21-2012, 6:41 PM
I been thinking about making one myself....mite have to turn to you for tips.

Looks great!!

Bigtwin
09-21-2012, 6:44 PM
Would love to see/hear the results! Very nice looking job.

iano1
09-21-2012, 7:08 PM
That's sweet- it would be nice with cerakote

Kinsel83
09-21-2012, 7:14 PM
Looks great

ar15barrels
09-21-2012, 7:28 PM
Can be used for an AR or .22, machined it out of stainless. Have always been surprised at the price of muzzle brakes. I've commented a couple times that it's really not a impossible task for the price. This is by no way a scientific product, but I incorporated a couple ques from one's I've liked.

If you want to make it more effective, open up the hole between the threads and the big port as large as possible.
You want the gas to expand as much as possible before hitting the front of the port.
When you keep the bore small, you are collimating the gas to follow the bullet.
The more the gas follows the bullet, he more that escapes out through he center instead of expanding to do work in the port.
The little front holes and the front cone do nothing after you scavenge so much gas off in that big port.

CobraRed
09-21-2012, 7:36 PM
If you want to make it more effective, open up the hole between the threads and the big port as large as possible.
You want the gas to expand as much as possible before hitting the front of the port.
When you keep the bore small, you are collimating the gas to follow the bullet.
The more the gas follows the bullet, he more that escapes out through he center instead of expanding to do work in the port.
The little front holes and the front cone do nothing after you scavenge so much gas off in that big port.

Didn't know that about the first hole. I'll keep it in mind.
For the rest, it's a .22. Wasn't trying to reinvent the wheel.

I made one where the hole is 3/4 instead of the 5/8, looks quite big and flimsy. But im sure it works better.

G38xOC
09-21-2012, 7:48 PM
no china crap . its homemade in USA !

looks awesome !

mif_slim
09-21-2012, 7:49 PM
Offtopic:

Is that AR15barrel who I think it is?!?!

lazyworm
09-21-2012, 7:56 PM
Offtopic:

Is that AR15barrel who I think it is?!?!

Yes, there is an "I'm back" thread somewhere.


OP, Nice job! Range report please.

Mg911guy
09-21-2012, 8:05 PM
Sweet MB! Keep up the great work.

Roland Deschain
09-21-2012, 8:31 PM
Yes, there is an "I'm back" thread somewhere.

http://www.calguns.net/calgunforum/showthread.php?t=620369&highlight=I%27m+back

CobraRed
09-29-2012, 11:40 AM
Super high quality vid
3-XJsqlRox0

BenHa
01-31-2013, 6:05 PM
:eek::44::chinese:

CobraRed
02-01-2013, 1:04 PM
Thread update

http://img7.uploadhouse.com/fileuploads/17238/172382112f7d26cf99f2d24663e51c49d2b55233.jpg

http://img6.uploadhouse.com/fileuploads/17238/172382100ace1bcf729d60c32ab1e800911f64d7.jpg

SFCRangerDoc
02-01-2013, 1:09 PM
How much for one for an AR?? i'd buy one if the price is right!

rabagley
02-01-2013, 1:57 PM
Nice little mill you've got there.

BomarFab
02-01-2013, 2:37 PM
Nice work. I just made a brake for myself since I couldn't find exactly what I wanted. It's fun.