Functionality challenge: Over the 3rd spherical I get a lightweight hammer strike. I have tried using each H2 and H3 buffer weights. H2 I used to be only receiving 1 shot, H3 I now get two shots off. I have attempted this on two uppers, one particular carbine and 1 https://finnlcshw.wikibuysell.com/1673653/not_known_facts_about_frt_15