Function problem: About the 3rd round I get a light-weight hammer strike. I have experimented with both equally H2 and H3 buffer weights. H2 I was only having a single shot, H3 I now get two pictures off. I've tried using this on two uppers, one carbine and just one https://frt1578901.blogtov.com/17574913/helping-the-others-realize-the-advantages-of-rare-breed-frt-trigger