02-18-2019, 04:09 AM
I do not. That insert was originally used to mitigate extractor bounce when firing full auto in 5.56. Not needed for semi auto fire. Some may argue but I’ve fired several thousand rounds of grendel in semi auto and can’t think of any malfs other than when I turned gas block all the way down to fine tune on my first build several years ago.
Member since 2011, data lost in last hack attack