07-16-2020, 03:27 AM
Any true Mil spec BCG, and a Group buy 65arms bolt. This doesn't need to be rocket science. Grendel works with the M4 pattern system. It takes a new barrel and bolt, and mags. Otherwise, leave it alone. It's not hard. Save yourself the troubles, and don't make it so.
Nothing kills the incentive of men faster than a healthy sense of entitlement. Nothing kills entitlement faster than a healthy sense of achievement.