Purpose difficulty: On the 3rd spherical I get a light-weight hammer strike. I have tried each H2 and H3 buffer weights. H2 I used to be only getting one shot, H3 I now get two shots off. I've attempted this on two uppers, a single carbine and 1 pistol, but https://rare-breed-frt-trigger01234.blogkoo.com/rare-breed-frt-options-56066516