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Old 03-06-2013, 04:22 PM   #11
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Quote:
Originally Posted by boudmanj View Post
Sorry got my words jumbled, its the square manufacturers marking from bafe
Yes, Brass Aluminum Forging Enterprises. They use the square forge mark and produce nice receivers. By chance all of my uppers (BCM, Daniel Defense and PSA) are theirs.

Do you have cabine length or midlength gas? H3 definitely is too heavy for 14.5" midlength. Often is ok for carbine length if you don't use low powered ammo. A lot of real M4s have the H3 but of course they use NATO powered rounds and are carbine length 14.5".


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Old 03-06-2013, 10:56 PM   #12
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Started off with a H3 buffer eh?

FIRST Go with Purehavoc's suggestion and use a standard carbine buffer first.

Have you tried, just loading one round in a mag, and seeing if the bolt locks back after you shoot it? What kind of ammo are you using? Have you tried M193 or M855 5.56 x45 nato with the same results?



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Old 03-06-2013, 10:59 PM   #13
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I run the same buffer in my other ar, no issues, its definately not the buffer, had my gas tube checked out, its bad and my gas key is off centered, on top of everything else, I have a bum gas block

In 8 1/2 yrs as an 0311 in the usmc, I've never come across this problem, I'm not sure how to properly stake a gas key or even if I really need to change it

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Old 03-06-2013, 11:09 PM   #14
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http://www.firearmstalk.com/forums/f20/tinkering-your-ars-timing-simple-buffer-springs-swaps-60577/

http://www.firearmstalk.com/forums/f20/st-t2-commercial-buffer-tube-85441/
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Old 03-06-2013, 11:12 PM   #15
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If your gas key is bad, your gun won't cycle. If your gas block is leaky, your gun won't cycle. Those are pretty significant failures.

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Old 03-06-2013, 11:33 PM   #16
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That seems to be the general consensus at the local gun shop, I know where I can get a block and tube, the gas key may be a hard, I'm anxious to get this thing up and running

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Old 03-07-2013, 03:04 AM   #17
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if your gas key is off center it will damage the gas tube , if it cycles without damaging the gas tube I would leave it alone, take the key off, get new grade 8 bolts , torque to the proper specs and stake it . what kind of upper do you have ?

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Old 03-07-2013, 11:18 AM   #18
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Bafe upper, bushmaster bcg, apparently the bcg is almost 5 yrs old and has a couple hundred rounds through it, can't see that being a problem though, I've put hundreds of thousands of rnds down range and never bent a gas key, I am going to track one down though and not a take a chance in messing up a new tube

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Old 03-07-2013, 11:35 AM   #19
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Did u try the buffer change.?
When u put the gas key on put a little bit of lock tite between the key and carrier and let dry over night this will help seal it also. Here's what I have noticed taking stuff to a shop and this doesn't qualify for all shops. #1 most of them around here know very little about ARs as far as fixing a problem or tuning . 9/10 times you spend money with their fixes that never fixes it.
If you have a problem and bring it to the boards listen to what people are telling you and try the stuff that doesn't cost u a ton of money.
I build my own buffer weights for each gun I own I have 2 16" identical barrels ,same manufacturer, same twist same every thing . One runs a 4.4oz buffer. The other chokes all over its self with any thing more than a 3.8 oz buffer.
Another thing I would do is make sure you have the proper length buffer spring in it.

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Old 03-07-2013, 02:13 PM   #20
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Tried three different buffers, same result, my gas block leaks, carbon on the hand guards, and I just found out my gas tube is bad from the guy I got it from, didn't pay anything for it thank god



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