45 acp ar upper

[bobby]

think I might have decided on a kaw Valley 10 oz tungsten buffer. see if that slows down blow back a little bit to get a better burn

[Gunslinger1911]

Thanks for the link.
Whew, pricy !
If you go ahead and get it, let us know how it goes.

On an older thought, was it Olympic that had the mag loader "helper" ?

[bobby]

yes I seen it about a month ago on their sight. but just looked and can't seem to find it now

[bobby]

might just call them and see if it is available.

[bobby]

for those interested the kaw Valley buffer and their spring was maybe to much! would not throw last few pieces of brass out. maybe was to heavy. tried it with a standard spring was a little better but still had some hang ups and did not clean brass up any. plus move load up to 5.2 and no change in soot

[Cosmic_Charlie]

The chamber on your upper may be a bit looser than your pistols. Increasing buffer weight and spring tension is very good advise. Years ago I was close to starting on a 45 acp FAL conversion but I never went through with it. I do have a yugo mauser that I converted with a Rhinelander kit. Quiet as a .22 and one hole at 50 yds.

[Tackleberry41]

My 9mm AR has alot of soot, its just the bolt opening. It will work with a light buffer, but your really need 2lbs or so of bolt and buffer in a blowback 9mm. Those buffers are available, but not cheap. I made 2 buffers out of brass for $25 with a chunk of brass left for another small project. And I could make it longer so no spacer required in the buffer tube. I know in mine you can use a rifle or carbine spring. Rifle spring will help hold the bolt closed.