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Posted: 9/9/2014 12:52:23 PM EDT
[#1]
I absolutely love my CQBR clone. 10.3" 5.56 and never so much as a hiccup performance-wise. As far as buying the 5.56 vs the 300blk, if you're not going to suppress it then 5.56 all the way.
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Posted: 9/9/2014 12:52:54 PM EDT
[#2]
12.5" 556
or 8.5" 6.8 My personal favorites |
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Posted: 9/9/2014 12:54:59 PM EDT
[#3]
Since I built my 7.5" 5.56, my other ARs hardly ever get to come out and play.... |
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Posted: 9/9/2014 1:07:03 PM EDT
[#4]
12" IDF / KISS carbine.
It is really light and handy and becoming one of my favorite rifles. Plus 12/12.5" still provides decent velocity.  DSC_4299 by The Dorsal Fin, on Flickr
I have a YHM phantom 5.56 can that is on my 11.5", but have decided to leave this one unsuppressed (won't get a QD mount for it) as it will mess up balance. |
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Posted: 9/9/2014 1:22:58 PM EDT
[#5]
Honestly knowing that I wouldn't have a can coming or the ability to have a can I'd opt for a 12.5''.
I have an 11.5'' and I feel as though it's the awkward in-between. And what I mean by that is that I'd like to have a 10.5'' (now that they run reliably) with a can and then a 12.5'' without. The 11.5'' with a can is just a tad longer, and without I wish it were a little longer so as to increase velocity and decrease the concussion/unburnt powder. Do some research on this one for sure. The 10.5's are all the cool-guy-gun rage but you said it yourself "adding a noise maker"... I think the 12.5'' is a hell of a lot more than just a noise maker... not saying the 10.5 won't be lethal as well though the 12.5'' I'd say would be more pleasant and possibly more controllable. |
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Posted: 9/9/2014 1:24:09 PM EDT
[#6]
11.5".
If I was doing a 12.5" I'd just go ahead and do a 14.5" John Noveske stated if he only had two AR's, it would be a 12.5" and an 18", or so I was told. Dave N |
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Posted: 9/9/2014 1:24:44 PM EDT
[#7]
300 Blackout would be my choice.
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Posted: 9/9/2014 1:26:03 PM EDT
[#8]
Quoted:
I absolutely love my CQBR clone. 10.3" 5.56 and never so much as a hiccup performance-wise. As far as buying the 5.56 vs the 300blk, if you're not going to suppress it then 5.56 all the way. FPNI 
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Posted: 9/9/2014 1:27:58 PM EDT
[#9]
Quoted:
12" IDF / KISS carbine. It is really light and handy and becoming one of my favorite rifles. Plus 12/12.5" still provides decent velocity. <a href="https://flic.kr/p/ouA31R" target="_blank">https://farm6.staticflickr.com/5568/14763351369_759eabb48e_b.jpg</a>DSC_4299 by The Dorsal Fin, on Flickr I have a YHM phantom 5.56 can that is on my 11.5", but have decided to leave this one unsuppressed (won't get a QD mount for it) as it will mess up balance. Looks damn good. I'd like to build a couple like this for truck guns |
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Posted: 9/9/2014 1:28:01 PM EDT
[#10]
I love my 11.5" A1 in 5.56. Light, handy, easy to hit with, noticeably less muzzle blast than my 10.5". I shoot the 10.5" suppressed and the 11.5" unsuppressed, and if I hadn't simply found the right 11.5" upper on the EE I probably would have built one in 12.5".
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Posted: 9/9/2014 1:36:57 PM EDT
[#11]
11.5" for me only because I love the KAC 10.75" rails but, I would also suggest considering a 12.5" also.
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Posted: 9/9/2014 1:42:05 PM EDT
[#12]
10.3" Daniel Defense MK18 upper
KAC Full Ambidextorus lower Runs like a raped ape.  The finish matches spot on in real time, not sure if my iPotato camera is responsible. |
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Posted: 9/9/2014 1:43:03 PM EDT
[#13]
12.5" kino
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Posted: 9/9/2014 1:45:18 PM EDT
[#14]
Skip the SBR.
10.5" .300 AAC. KAK receiver extension. Sig Brace. If you go the tax stamp route, I still recommend .300 in a 10.5 as that is the shortest length from which you will make use of the powder. Less means less powder burnt. There are some who claim 9" is the least, but I go with DD on this. Plus you can put a 9" rail on it along with a can and still be at a typical carbine length. IMHO, Noveske is right. Less that 12" on a 5.56 causes you to waste powder, which in turn really reduces your velocity and the effectiveness of that tiny bullet. A 7.5 in 5.56 does look cool though. I have never built one but always though some sort of pigtail to lengthen the gas tube would be advisable. Post up what you end up building. Like anything else, jump in and see what works for your application after you do copious amounts of research, and have fun! |
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Posted: 9/9/2014 2:07:21 PM EDT
[#15]
I started out with a 10.5". It was a great gun and I never had one issue with a few thousand rounds through it. It was a real blast machine though. Then I got a 9" 300 BLK. That is an awesome little gun. Those that say the Blackout is only for suppressors with sub sonics are really missing out. That is a better gun to have if you reload. Then I dumped the 10.5 for a 12.5. I feel the 11.5 is just dumb. Only slightly better than a 10.5, but not as good as the 12.5... I just finished building my Zastava M92 into a rifle. A 10" AK with side folder is awesome. A heavy bitch, but awesome. If I had to choose one, it would be the 12.5" hands down... My second choice would be the 9" 300BLK. There is a lot of power in a small light package with the Blackout.
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Posted: 9/9/2014 2:17:19 PM EDT
[#16]
I'd stick with common calibers, 5.56, 7.62x39, or 9mm.
The 5.56 7.5" upper is freakin cool, but the ballistics are questionable. You can get good ballistics with expensive ammo (several threads going in pistol and ammo forum on that topic) 5.56 10.5" I really like this and is it was a duty weapon or for home defense/hunting I would choose this over the 7.5". I want to get the 10.5" pencil barrel that JT Dist. sells. Another option I have wanted to build is the 7.62x39 7.5". Radical firearms sells a really cheap upper. Soviets have been useing Krinks in this barrel length/caliber for decades. Proven lethality! |
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Posted: 9/9/2014 2:20:13 PM EDT
[#17]
Quoted: 12" IDF / KISS carbine. It is really light and handy and becoming one of my favorite rifles. Plus 12/12.5" still provides decent velocity. https://farm6.staticflickr.com/5568/14763351369_759eabb48e_b.jpgDSC_4299 by The Dorsal Fin, on Flickr I have a YHM phantom 5.56 can that is on my 11.5", but have decided to leave this one unsuppressed (won't get a QD mount for it) as it will mess up balance. I really, really, really love that gun.
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Posted: 9/9/2014 2:30:22 PM EDT
[#18]
11.5" full profile heavy, with standard KAC rails and stock FSB, 1/9 is my favorite for shorty without suppressor. This is the setup I used in Afg before the MK18 uppers became standard issue for us.To me the additional weight makes it balance a bit better, and even if I did add a can it wasn't too terribly long.
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Posted: 9/9/2014 2:36:10 PM EDT
[#19]
Quoted: 12" IDF / KISS carbine. It is really light and handy and becoming one of my favorite rifles. Plus 12/12.5" still provides decent velocity. https://farm6.staticflickr.com/5568/14763351369_759eabb48e_b.jpgDSC_4299 by The Dorsal Fin, on Flickr I have a YHM phantom 5.56 can that is on my 11.5", but have decided to leave this one unsuppressed (won't get a QD mount for it) as it will mess up balance. My 12.5" is a BCM Kino and I really like it, but since I only use iron sights, I kind of wish I would have gone with an IDF clone. Oh well. I don' feel like I'm missing out, but I would like an A1/A2 upper with plastic handguards.
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Posted: 9/9/2014 2:38:08 PM EDT
[#20]
I'd go with an 11.5"/12.5" 5.56 and skip the 300BLK but this is what I have.
Top Rifle: BCM upper receiver Daniel Defense 12.5" CHF 5.56mm barrel w/ factory pinned low-pro gas block Griffin Armament Tactical Compensator w/ tabbed washer Spikes melonited carbine length gas tube. BCM KMR 10" handguard w/ KAC Panel Kit BCM Keymod Sling Mount Spikes Tactical BCG BCM Mod4 Charging Handle Daniel Defense front BUIS Troy rear BUIS Surefire X300U-A (will be adding a Unity Tactical EXO) Vltor EMOD Stock Trijicon TA33G-H ACOG w/ Larue LT-105 mount Blue Force Gear VCAS sling w/ aluminum adjuster ****9lb 0oz including 8 CR123A's, spare bolt, spare firing pin, spare gas key, spare gas rings, and a loaded 20rd PMAG w/ 75gr Hornady TAP FPD ammunition**** Bottom Rifle: BCM complete upper receiver w/ standard 11.5" 5.56mm barrel and A2 flash hider (will change out to either the Griffin Comp or Vltor A2 when the suppressor comes in) BCM KMR 10" handguard (need panels if BCM ever releases them) BCM Keymod Sling Mount Spikes complete BCG BCM Mod4 Charging Handle Daniel Defense front BUIS Troy rear BUIS Surefire X300 (will be adding a Unity Tactical EXO) Vltor IMOD Clubfoot Stock Aimpoint CompM4 w/ Bobro mount Blue Force Gear VCAS sling w/ aluminum adjuster ****8lb 9oz including 6 CR123A's, spare bolt, spare firing pin, spare gas key, spare gas rings, and a loaded 20rd PMAG w/ 75gr Hornady TAP FPD ammunition**** 
Top Rifle: AAC complete upper receiver w/ 9" 300BLK barrel, NiB BCG, and AAC 18T 7.62 flash hider KAC URX 3.1 handguard with panel kit IWC Offset Sling Mount BCM Mod4 Charging Handle LMT front BUIS (slightly modified) Troy rear BUIS InForce APL Vltor Modstock Clubfoot Stock Aimpoint CompM4 w/ QRP2 mount Blue Force Gear VCAS sling w/ aluminum adjuster Bottom Rifle: Adco built upper with DD 11.5" CHF 5.56mm barrel and 1st Gen MOE handguards IWC QD sling mount BCM BCG BCM Mod4 Charging Handle Vltor IMOD Clubfoot Stock Mil-spec carry handle Blue Force Gear VCAS sling w/ aluminum adjuster 
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Posted: 9/9/2014 2:56:27 PM EDT
[#21]
11.5" with a linear comp like the Claymore. Most flash hiders don't hide flash on a SBR very well and side port brakes suck (for the shooter). Anyone 180° in front of the muzzle probably won't like it though.
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Posted: 9/9/2014 2:59:45 PM EDT
[#22]
Quoted:
Quoted:
12" IDF / KISS carbine. It is really light and handy and becoming one of my favorite rifles. Plus 12/12.5" still provides decent velocity. https://farm6.staticflickr.com/5568/14763351369_759eabb48e_b.jpgDSC_4299 by The Dorsal Fin, on Flickr I have a YHM phantom 5.56 can that is on my 11.5", but have decided to leave this one unsuppressed (won't get a QD mount for it) as it will mess up balance. I really, really, really love that gun. It will have its own (non painted) lower once my eform gets approved. 
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Posted: 9/9/2014 3:01:54 PM EDT
[#23]
My opinion is 11.5" in 5.56
I do sometimes wish I had a 10.5 or 10.3 only for a touch bit more compactness but yet still feel like I'm shooting a rifle. However, I just recently went REALLY compact with a 7.5" in 5.56. Might not be your idea of an SBR but it's hella fun to shoot and before I took that A2 FH off, was one flamethrower with M193 ammo. The AAC Blackout I replaced the A2 FH with solved that issue. 11.5" goodness 
7.5" compact (before I removed the A2 FH and added some extra stuff) 
7.5" as she looks currently. Might ditch the M4 stock for a Magpul MOE in FDE. 
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Posted: 9/9/2014 3:11:09 PM EDT
[#24]
Quoted:
Quoted:
12" IDF / KISS carbine. It is really light and handy and becoming one of my favorite rifles. Plus 12/12.5" still provides decent velocity. https://farm6.staticflickr.com/5568/14763351369_759eabb48e_b.jpgDSC_4299 by The Dorsal Fin, on Flickr I have a YHM phantom 5.56 can that is on my 11.5", but have decided to leave this one unsuppressed (won't get a QD mount for it) as it will mess up balance. My 12.5" is a BCM Kino and I really like it, but since I only use iron sights, I kind of wish I would have gone with an IDF clone. Oh well. I don' feel like I'm missing out, but I would like an A1/A2 upper with plastic handguards. There is a way my friend - mine is a flattop upper.....
Click me - email Justin and see what the availability is, he makes them in batches every couple of months IIRC. |
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Posted: 9/9/2014 3:16:33 PM EDT
[#25]
I was going with a 10.5, but what Paul (BCM) said about them made me go with 11.5
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Posted: 9/9/2014 3:20:50 PM EDT
[#26]
If I could only have one SBR, and without a can, it'd be an 11.5" for sure.
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Posted: 9/9/2014 3:35:31 PM EDT
[#27]
Now I want to assemble a 12.5 Kino with that A1 handle. It would be bitching with some Middy Triangular guards like Nodak used to sell........
Thanks Finslayer, I'll mention you and your tits as hell IDF gun as an accomplice when the divorce goes down. |
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Posted: 9/9/2014 3:52:11 PM EDT
[#28]
I am leaning towards my 11.5, but I have been loving the 12.5s
My teeth rattling 10.3 needs a can ASAP  It would not be my choice for my one and only SBR, unsupressed
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Posted: 9/9/2014 3:55:33 PM EDT
[#29]
Quoted:
I am leaning towards my 11.5, but I have been loving the 12.5s My teeth rattling 10.3 needs a can ASAP It would not be my choice for my one and only SBR, unsupressedAs someone who has an 11.5 I want both a 12.5 and a 10.5.. It's real bad.. And threads like this don't do much to stop the want... |
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Posted: 9/9/2014 4:41:34 PM EDT
[#30]
If it was going to be your everything/ only ar I'd go 12.5 kino from bcm. Perfect balance of compactness and capability considering what I feel comfortable doin with a 5.56. Ymmv
If it was going to be an sbr and you have a 14.5 or longer bbl ar in the safe, then I'd go 11.5". I went 11.5 bcm w/ sig brace and aim point micro. It has turned into my do all carbine. I only ever reach for my 20" when I know I will be shooting at the 400m range. I'd go 10.5 or 10.3 only if I was going to suppress it or build a mk18 clone |
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Posted: 9/9/2014 4:48:39 PM EDT
[#31]
I really like the 11.5" BCM KMR LW upper paired with a pistol/SB15 configured lower.
Paired with a good Aimpoint micro red dot, you have a lightweight, accurate, extremely portable package that can be broken down and carried in a standard backpack. Can't get much better than that IMHO. |
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Posted: 9/9/2014 4:50:22 PM EDT
[#32]
Quoted:
Quoted:
I am leaning towards my 11.5, but I have been loving the 12.5s My teeth rattling 10.3 needs a can ASAP It would not be my choice for my one and only SBR, unsupressedAs someone who has an 11.5 I want both a 12.5 and a 10.5.. It's real bad.. And threads like this don't do much to stop the want... I really really like my 11.5, but I love my 12" more. I don't think its so much the barrel length, but the fact its a simple lightweight iron sighted gun. Something about it is just fun to shoot. With that said, I have another 11.5" that is also KISS, but in a different flavor....  DSC_2747 by The Dorsal Fin, on Flickr
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Posted: 9/9/2014 4:51:23 PM EDT
[#33]
Why are people recommending pistol braces when the OP wants an SBR?
Sure, the Sig brace has made leaps and bounds improvements for the usability of an AR pistol, but there is no substitution for an SBR. |
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Posted: 9/9/2014 4:54:14 PM EDT
[#34]
9mm. This was one of three I got stamps for at the same time, along with an SBS.
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Posted: 9/9/2014 5:20:40 PM EDT
[#35]
Quoted:
Now I want to assemble a 12.5 Kino with that A1 handle. It would be bitching with some Middy Triangular guards like Nodak used to sell........ Thanks Finslayer, I'll mention you and your tits as hell IDF gun as an accomplice when the divorce goes down. Dude, go skinny
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Posted: 9/9/2014 5:27:32 PM EDT
[#36]
12.5" Kino for me.
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Posted: 9/9/2014 6:00:29 PM EDT
[#37]
Quoted:
Quoted:
Now I want to assemble a 12.5 Kino with that A1 handle. It would be bitching with some Middy Triangular guards like Nodak used to sell........ Thanks Finslayer, I'll mention you and your tits as hell IDF gun as an accomplice when the divorce goes down. Dude, go skinny
http://i1107.photobucket.com/albums/h385/alaskaLTZ/IMG_2060_zpsf58a329c.jpg skinny is where it's at. |
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Posted: 9/9/2014 6:28:20 PM EDT
[#38]
Where are you guys even getting A1 uppers?
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Posted: 9/9/2014 6:31:04 PM EDT
[#39]
get your sbr stamp.. build for 11.5" 5.56.. then get 8+" 300blk out
300blk out is a soft shooting caliber i like very much.. and if you don't go subsonic.. you are looking at 50cents a shot,, which is not bad.. but you need to have 5.56 nato just in case. |
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Posted: 9/9/2014 6:44:32 PM EDT
[#40]
Quoted:
Where are you guys even getting A1 uppers? I got mine from the Great Blue Couch |
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Posted: 9/9/2014 6:52:08 PM EDT
[#41]
Quoted:
Where are you guys even getting A1 uppers? I saw one on the EE yesterday. And not technically A1 but DPMS sells c7 uppers |
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Posted: 9/9/2014 6:57:09 PM EDT
[#42]
Quoted:
Where are you guys even getting A1 uppers? Dpms has them on sale for $75, but they are c7 style. I also found several on the E.E. last night. |
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Posted: 9/9/2014 7:00:23 PM EDT
[#43]
So pretty much no true A1 uppers anywhere.
 Off topic, but I'd love a 20" A1.
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Posted: 9/9/2014 7:02:08 PM EDT
[#44]
Quoted:
12" IDF / KISS carbine. It is really light and handy and becoming one of my favorite rifles. Plus 12/12.5" still provides decent velocity. <a href="https://flic.kr/p/ouA31R" target="_blank">https://farm6.staticflickr.com/5568/14763351369_759eabb48e_b.jpg</a>DSC_4299 by The Dorsal Fin, on Flickr I have a YHM phantom 5.56 can that is on my 11.5", but have decided to leave this one unsuppressed (won't get a QD mount for it) as it will mess up balance. Put a fiberlite stock on it & it'll be really light & handy. |
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Posted: 9/9/2014 7:09:35 PM EDT
[#45]
Snag a CNC A1 carry handle and make any flat top a quasi A1.
What I did. |
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Posted: 9/9/2014 7:55:02 PM EDT
[#46]
Quoted:
I was going with a 10.5, but what Paul (BCM) said about them made me go with 11.5 Same for me. Dwell time for reliability plus fragmentation with M193 within self-defense range. So, even with a can that would be the minimum length for me. |
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Posted: 9/9/2014 8:04:07 PM EDT
[#47]
Quoted: So pretty much no true A1 uppers anywhere. Off topic, but I'd love a 20" A1.  |
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Posted: 9/9/2014 8:08:01 PM EDT
[#48]
Quoted:
I was going with a 10.5, but what Paul (BCM) said about them made me go with 11.5 Same Here, went with a 11.5' Standerd BCM upper! |
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Posted: 9/9/2014 8:08:02 PM EDT
[#49]
Quoted:
True A1 uppers pop up all the time on EE. I got mine plus the Colt SBR'd lower I just took off my CQBR (it got a SOCOM lower) so now all I am on the hunt for is a good 12.5" FSB barrel so that I can complete this: [url=https://lh4.googleusercontent.com/-tilJhjiAlLM/U1gmOWrbiSI/AAAAAAAA4-A/Xm-pO_9fMwI/w895-h1209-no/IMG_20140423_164418.jpg]https://lh4.googleusercontent.com/-tilJhjiAlLM/U1gmOWrbiSI/AAAAAAAA4-A/Xm-pO_9fMwI/w895-h1209-no/IMG_20140423_164418. Just send that one to ADCO, brother. They will chop it up just right 
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Posted: 9/9/2014 8:20:21 PM EDT
[#50]
Quoted: Quoted: True A1 uppers pop up all the time on EE. I got mine plus the Colt SBR'd lower I just took off my CQBR (it got a SOCOM lower) so now all I am on the hunt for is a good 12.5" FSB barrel so that I can complete this: [url=https://lh4.googleusercontent.com/-tilJhjiAlLM/U1gmOWrbiSI/AAAAAAAA4-A/Xm-pO_9fMwI/w895-h1209-no/IMG_20140423_164418.jpg]https://lh4.googleusercontent.com/-tilJhjiAlLM/U1gmOWrbiSI/AAAAAAAA4-A/Xm-pO_9fMwI/w895-h1209-no/IMG_20140423_164418. Just send that one to ADCO, brother. They will chop it up just right I know but if I send them them this LW barrel, they won't be able to get the "shoulder" milled right behind the muzzle device. I'm looking at a Noveske CHF 12.5" w/FSB right now so I may have something in the works! Here is the part I am concerned with:  |
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