George9
Member
Pull the extractor and check for what parts are there. Put original buffer and original buffer spring back in and start from there.. It sure as heck should run great with 5.56's too.. George
I know this is an older one, but I did finally seem to fix the problem. I changed the entire extractor assembly with the BCM extractor kit and had 0 problems firing Independence and Federal XM193 over 20-30 some rounds. My original extractor from S&W did have the rubber ring over the extractor spring, but the replacement seems to provide much more force than the original