Purpose difficulty: On the 3rd round I get a light hammer strike. I've tried using both of those H2 and H3 buffer weights. H2 I had been only having a person shot, H3 I now get two photographs off. I have experimented with this on two uppers, a single carbine https://jasperphxoc.blogunok.com/37196848/rumored-buzz-on-frt-trigger