I have a BCM 16 Reece rifle mid length gas system. I've owned it now 4 years or so. It has always threw and 4 to 430 ejection pattern. The only thing j have done to it recently was put a surefire warcomp as a muzzle device and worked great.
I took it off about a week ago and reinstalled the BCM Mod o muzzle device back on it. It suddenly starting throwing a 2 to 230 ejection. I changed the buffer spring to make sure it wasn't getting weak and then added a H2 buffer that was 11 grams heavier and sane thing. Also, noticed today some pretty noticeable ejector marks on the head stamp. Any suggestion on what could could cause this.
Field stripped the gun done through cleaning checked gas tube and gas block nothing seems really out of place. Any help would be appreciated.