So I've been working on this AR build since Christmas, and just recently got it finished. Today I took her out for her first day at the range to find I had on my hands a rather clumsy straight pull bolt rifle rather than the life and liberty gun I had envisioned. Needless to say, I was quite disappointed by this. I was wondering if any of you might have some insight as to what's going wrong. I checked that the gas block wasn't bleeding off gas by wrapping a kleenex around it and firing a few shots. It came off clean as it was when I put it on and undamaged. Also I know that my gun is getting at least some gas because it partially cycles. I was thinking it might be a buffer/buffer spring problem, but my familiarity with troubleshooting the AR platform is almost entirely theoretical, so I might be way off base. As always, any help will be greatly appreciated. Full disclosure and because it may be relevant information, the gun in question is a 10.5 inch pistol, but I posted in rifle country because A) I plan on making it an sbr and B) I know more AR guys are likely to be trolling through here than in pistols.