I only have one registered SBR lower and currently what sits on it is a 10.5" LMT 5.56mm upper.
I would like to use it on my 9mm Tros 5" upper on occassion and would like to keep the same hammer for both 9mm & 5.56mm caliber use. I have heard that the M16 hammer would work for both and is reliable. Will I have any issues with the 9mm hammer if I were to switch back to the LMT 5.56mm?
I’d get a 16 hammer and modify it. I’m really not too warmed up to sticking any DPMS parts in my guns. I don’t have solid data to back that up… just the corner cutting they do in other areas makes me avoid them.