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Semiauto Rifles Gallery Post pictures of your rifles and carbines here!

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  #1  
Old 01-19-2017, 9:22 AM
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Allbert Allbert is offline
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Talking Why I Chose a 20" AR-15

A 20" Ar15 with collapsible stock. I call it the 20" m16A5 clone because of its Vltor A5 buffer system.









This is our dog, Ryu! (REE-YOU)


So I absolutely love rifle length Ar-15s. After shooting carbine, mid-length, and rifle AR's, I went with the rifle length. This one is pending registration.

Some advantages: These are mostly theoretical

-Higher velocity (although not that much more compared to shorter barrels, but it's nice to have when shooting at distance).
-Complete powder burn (hate being wasteful), so theoretically less muzzle flash.
-Reduced concussion, flash and pressure compared to my 11.5" ar pistol
-Not very loud even with a muzzle brake on it and even more reduced recoil on top of having the rifle gas system.
-Reduced bolt bounce and a more reliable feeding system due to heavier buffer weight and optimum amount of gas traveling to bolt assembly.
-No questions reliable gas system out of the three (not saying mid-lengths or carbines are unreliable).
-Cost! Finding rifle length barrels, parts and complete uppers was a lot cheaper than the 16 inch uppers. Overall, my build for a reliable rifle came out to about $900 buying new and used parts.

Of Course the cons:

weight- this one is 7lbs. 14 oz
length (depending on environment). Used Vltor a5 buffer system to keep the heavier buffer and longer spring but still be able to adjust my stock on the go.

Parts:
BCM Complete 20" Upper w/ gov't profile barrel
Strike Industries J Comp
Magpul M-Lok rifle length handguard
Magpul MVG
Gunfighter Tactical rally lower
Magpul BAD Lever
PSA standard LPK
Strike Industries Takedown pins, Cobra fang Trigger guard, and endplate
BCM Medium Charging handle/ BCG
Magpul MBUS Rears
Vltor a5 buffer system with standard 5.3 oz buffer and rifle length buffer spring
UTG Pro S1 stock

So whether a 20" AR is right for you is completely up to you. Midlength and carbine rifles are great and I have no problem with them but every time I go to the range I always take my 20" AR. It's just a little better shooter for me. This will most likely be my SHTF rifle. I have no reservations or worries that this rifle will malfunction or fail on me. It's simple, it's reliable, and it's accurate. Keep it simple. Thanks for reading and I'm hear to answer any questions about this build. Take care, stay safe.

Last edited by Allbert; 01-19-2017 at 12:21 PM..
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  #2  
Old 01-19-2017, 9:24 AM
someoneeasy someoneeasy is offline
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did I miss where you said why?
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Old 01-19-2017, 9:25 AM
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Quote:
Originally Posted by someoneeasy View Post
did I miss where you said why?
I'm in the process of writing it up. I uploaded the pics first from my phone haha. Stay Tuned.
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Old 01-19-2017, 10:07 AM
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Quote:
Originally Posted by Allbert View Post
I'm in the process of writing it up. I uploaded the pics first from my phone haha. Stay Tuned.
gotcha. I got eager cuz I love me some 20" ARs haha
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  #5  
Old 01-19-2017, 10:09 AM
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I like that comp.
Kinda looks like mine.
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Old 01-19-2017, 10:14 AM
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My first one was a 20" A2. Still have the barrel with same MOE rifle hand guard. Got rid of the carry handle upper so it looks alot like yours. HEAVY.

Never bought another one though. Just got an 18".
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Old 01-19-2017, 12:19 PM
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The 20"/rifle length gas system feels substantial when you shoot it. I kind of miss mine.

Now watch it slowly warp into some semblance of an A4 clone...
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Old 01-19-2017, 12:35 PM
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Quote:
Originally Posted by robledo View Post
The 20"/rifle length gas system feels substantial when you shoot it. I kind of miss mine.

Now watch it slowly warp into some semblance of an A4 clone...
Haha. I've been thinking of chopping the FSB down to fit a freefloat rail over it actually. bahaha

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  #9  
Old 01-19-2017, 12:51 PM
dahrayyal dahrayyal is offline
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Great info! Ive been thinking of getting a 20" set up. Yours looks clean
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Old 01-19-2017, 4:39 PM
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I want to build a 20'' slick side (no FA) with lightweight barrel upper. THanks for the inspiration.
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  #11  
Old 01-20-2017, 6:29 AM
jarhead714 jarhead714 is offline
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A2 all day everyday. Keep it simple, STUPID!!
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  #12  
Old 02-11-2017, 2:57 AM
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old thread but without going out and buying a VOLTR A5 kit, could i just throw an H2 buffer in my Carbine length 6 position stock all while maintaining the same carbie length spring and be in the green?
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  #13  
Old 02-11-2017, 7:21 AM
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Quote:
Originally Posted by kevman0154 View Post
old thread but without going out and buying a VOLTR A5 kit, could i just throw an H2 buffer in my Carbine length 6 position stock all while maintaining the same carbie length spring and be in the green?
I run a ST-T2 Heavy Buffer in my carbine buffer tube on my 20" rifle length barrel with no issues. It runs really smooth and reliable
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  #14  
Old 02-12-2017, 6:56 AM
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Quote:
Originally Posted by kevman0154 View Post
old thread but without going out and buying a VOLTR A5 kit, could i just throw an H2 buffer in my Carbine length 6 position stock all while maintaining the same carbie length spring and be in the green?
Yeah you should be fine with that setup. Ive tried it on my build and it functioned fine. Not as smooth as the a5 still. Im a believer now haha.

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  #15  
Old 04-23-2017, 1:00 AM
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I love the rifle lengths. Looks real good!
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Old 07-08-2017, 6:36 AM
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Update. Put on a Magpul SL stock, KAC Micro Buis. Debating on what optic to put on to replace the TRS-25 I have on currently. Suggestions on optic?

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  #17  
Old 07-08-2017, 7:30 AM
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Great looking rifle, but if you're in to the 20" build why not get an optic with +-6x magnification and make it in to an SPR?
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Last edited by etwinam; 07-08-2017 at 9:50 AM..
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  #18  
Old 07-08-2017, 7:47 AM
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This thing is a screaming deal. I was looking at this one for a SAM-R clones, but ultimately still not the Mark 4 with correct magnification (3-9). But damn its cheap, the optical quality will be insane for a scope that cheap.

But still, I think it would look nice on your build. http://www.eurooptic.com/leupold-mar...tmr-60210.aspx

I got a 20 incher just recently, Stag had a great deal so I relented to assemble another AR. If anyone interested, 20" rifle kit for like $464. https://www.stagarms.com/model-4-rifle-kit/ **It is an HBAR**

Last edited by Over It; 07-08-2017 at 7:53 AM..
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  #19  
Old 07-08-2017, 8:04 AM
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Quote:
Originally Posted by Over It View Post
If anyone interested, 20" rifle kit for like $464. https://www.stagarms.com/model-4-rifle-kit/ **It is an HBAR**
That's a tempting way to get back into an A2.
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Old 07-08-2017, 9:21 AM
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Quote:
Originally Posted by crufflers View Post
That's a tempting way to get back into an A2.
With a lifetime barrel guarantee, even though it isn't chromed lined, I'm going to make it my varminter and shoot the bejeezus out of it.
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Old 07-08-2017, 10:26 AM
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Heres another good deal for those interested

http://www.del-ton.com/ProductDetail...uctCode=RKT106
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Old 07-08-2017, 12:13 PM
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Thanks for the suggestions! I was actually looking for a variable optic something with an etched reticle and illuminated reticle too

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  #23  
Old 07-08-2017, 12:24 PM
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I have a couple 20" AR's. They are my favorite variants and are superior in most situations, except in small spaces such as HD applications.
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Old 07-08-2017, 12:28 PM
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Quote:
Originally Posted by Bobby Ricigliano View Post
I have a couple 20" AR's. They are my favorite variants and are superior in most situations, except in small spaces such as HD applications.
Yeah i tried to improve that by swapping mt a2 stock out for tje Vltor A5 system.

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Old 07-30-2017, 7:56 PM
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Nice. I love my 20" Larue, but the fat barrel makes it kind of a pig for anything tactical other than barrier shooting. Wish it was a little lighter. But for SPR style shooting and shots out to and beyond 800, it's nice to have.

What type of ammo do you plan to use with it? That will help somewhat in determining what kind of optic to buy.

BTW, nice dog. I have a white shepherd, too.
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Old 08-06-2017, 10:55 AM
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I do most of my shooting at 200-400 yards with iron sights. So for me, I much prefer the 20" because of the longer sight radius and higher velocity.

But if I'm plinking around at 50-100 yards with friends or newbies, my 11.5" is just dandy.

If I could only have one, it would be the 20".
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Old 08-06-2017, 11:37 AM
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I'd like to build an early M16 clone just for its history.
My only 20" now is a bull barreled RRA Varmint
https://www.rockriverarms.com/index....TOKEN=87676424
Attachment 628871

Last edited by M1NM; 09-15-2018 at 6:07 PM..
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Old 08-06-2017, 2:57 PM
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Here is my bare bones 20" build. I put the pistol grip on in Nevada this weekend so I could use it as God intended.

I fell in love with it. While slightly heavier, it was very soft shooting. It was easier to use the irons without the recoil of a jumpy carbine.

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Old 10-24-2017, 4:39 PM
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When it comes to Iron Sights or shooting at 200+ yards, I'll take the 20" rifle any day.
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Old 10-29-2017, 8:03 AM
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Update: freefloated the barrel with DD 12.67”, and thicker b5 sopmod stock.
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Old 10-29-2017, 9:48 AM
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What are all the options for a PERMANENT integral ONE-PIECE carry handle receiver? I'd like a complete upper with carry handle. Even the ones here if you look close the are pic rails with bolt on.

I see STAG has stripped A2's but none complete that I could see. Windham (I assume is still like a good quality Bushmaster when Bushmaster was good stuff) looks like it has all bolt-on too.
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Old 10-29-2017, 10:06 AM
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Quote:
Originally Posted by Allbert View Post
Update: freefloated the barrel with DD 12.67”, and thicker b5 sopmod stock.
It is perfect now IMO! Nice OP!
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Old 11-07-2017, 7:41 AM
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Quote:
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Update....
Nice! I love it. Always great to see people upgrade their guns with genuinely good stuff. You didn't cheap out on anything and you have a rifle you can be proud of. KAC 600m rear buis and Aimpoint?

All it needs now is a Surefire M600 and an SR07 pressure switch and you're basically done.

Last edited by robledo; 11-07-2017 at 7:44 AM..
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Old 11-24-2017, 3:26 PM
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Awesome rifle!

Which buffer weight did you use with the A5 system?
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Old 11-24-2017, 3:28 PM
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Awesome rifle!

Which buffer weight did you use with the A5 system?


A5H2 as i was recommended from vltor themselves for 20” rifle. Been 100% reliable but i wanna see if i can lower the recoil impulse with a A5H0


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