Function issue: To the 3rd round I get a lightweight hammer strike. I've tried using both of those H2 and H3 buffer weights. H2 I used to be only receiving 1 shot, H3 I now get two pictures off. I have tried using this on two uppers, one particular carbine https://mariogzsjz.wikiconversation.com/7497527/top_frt_trigger_secrets