Hey guys, I know this has been beat to death but I want to visit it again. I have built 8 5.56 ar15's with no issues but my .450 is giving me some problems. first I'll tell you what I have and then what's happening.
I have a Sota upper and lower, Sota bolt and carrier. 18" bear creek barrel, mid length with a Sota low profile gas block. Leapers A2 stock with the buffer and spring that came with it, I think it's H3 about 5 oz.I had some early issues with the mags but with the help of this forum I modified them so they are working now. The gun cycles fine manually
with 5 rounds in the modified 20 round mags. I went out yesterday and shot 13 rounds and not 1 round loaded correctly. All ejected with no issues. I took a movie with my phone and it appears to me the bolt is not cycling completely. Like maybe a full inch from going completely back.
I took it apart today and checked the gas hole in the barrel .088. The gas block is aligned properly. The bolt carrier is free with no signs of binding anywhere. I'm thinking of going to an H2 buffer. I don't really want any more recoil but I want it to cycle properly. The buffer is not hitting the stock screws just to eliminate that.
Any help would be greatly appreciated.
Thanks, Joe