Buffer weight confusion

AR/M4 AR Technical Discussion
1

I just went and shot my first ground up build last night and I have a few questions in regards to buffer weights and what should I do next.
Due to US export laws (ITAR) it is difficult getting Noveske or any other AR-15 parts for that matter.
For the last 10 months I’ve been gathering parts to build a Noveske Afghan.

I ran 150 rounds through the gun last night and it ran flawlessly with 3 different types of ammo.
Norinco “yellow box” xm193 spec. Which is pretty hot and makes nice huge fireballs with my JP compensator.
Hornady 55gr FMJ loaded reasonably hot.
69gr SMK’s loaded to 2400 FPS to make minimum power factor.

I have 3 AR’s of different configurations and was wondering what I could try to make them a little softer shooting.
All 3 run with 100% reliability and would like to keep it that way
All 3 are running 3oz. carbine buffers with 37 coil springs.

#1 14.5" M4 profile barrel chrome lined with carbine length gas (Norinco CQ-A)
#2 18" medium profile stainless barrel with rifle length gas (Stag 3G)
#3 14.5" medium profile stainless barrel with mid length gas (Noveske Afghan)


Thanks in advance

2

VLTOR A5 systems and BattleComps work very well for me in mitigating recoil without any impact on reliability. IMHO, an A5 would be your next step in recoil management.

3

Unfortunately the Magpul UBR buttstock uses an A2 style receiver extension tube which would not be compatible with the Vltor A5 system.

Springco springs are also ITAR regulated and cannot be exported so something that works with a standard carbine spring would be preferable.

4

You should try out an H or H2 buffer, Questar has LMT H and H2 buffers in stock.

5

Switching the Carbine buffer to an H2 would be my preferred course of action as well if not switching to the VLTOR A5. I run VLTOR A5 on my 20" as well as my 14,5" (both made by Oberland Arms but upgraded by me) and I have never had a problem with either of them. I have friends who have 14,5" and 16" carbine-length gas systems who (on my recommendation) tried using H2 buffers with very good results (much softer shooting).

6

You need H and H2 buffers. Look for a machine shop that can cut tungsten weights in the form factor of the steel weights in your buffers. If you replace one steel with tungsten you have an H buffer. Two gets you an HH/H2 buffer. Three is an H3 buffer. Can you buy Diemaco/Colt Canada parts?

7

The Stag is underpowered and in fact there is virtually no properly built carbine or midlength gas system that cannot use at least an H buffer. I am almost positive that you can purchase a buffer through Brownells and send it to Canada. I am almost certain that the ITAR stuff was recently revamped.

8

Since most buffers are less than $100 there are no problems shipping them to Canada as long as the manufacturer is registered with DDTC for export. I’ve ordered the Colt H2 buffer from Brownells and had it shipped to Sweden.

9

It was not exactly revamped, it is still very much in place they just changed the dollar limit for gun parts from $100 to $500.

10

Not to stray too far off subject, but when was this and do you by any chance have a link to a page/document regarding this change?

X-mas came early this year! :wink:

Tapatapatapatalk

11

Forgot to add, this is only for Canada. Sorry.

12

NOoooOooOOOOO! :mad:

Tapatapatapatalk

13

Sounds like revamped to me. But, in any case if he his north of the border then it shouldn’t be an issue.

14

For $100-$500 we need to fill out an end user certificate but do not need an export permit like we did before.
The Colt H2 is back ordered at Brownells but I found a Canadian dealer who has both H and H2 LMT buffers in stock.
I will be making a call tomorrow.