06-09-2016, 11:17 PM
these 20" in 4140 are grendel chambered
got a solid no go on my 264 bolt -- chambered and ejected perfectly with the grendel bolt. so now i gots to buy another grendel bolt--lol
after i cut off the e 1/2" of nipple they left after the muzzle i found out that a 9-16 or 5/8-24 are both two big-- a standard 5.56 FH fits perfectly well.
got a solid no go on my 264 bolt -- chambered and ejected perfectly with the grendel bolt. so now i gots to buy another grendel bolt--lol
after i cut off the e 1/2" of nipple they left after the muzzle i found out that a 9-16 or 5/8-24 are both two big-- a standard 5.56 FH fits perfectly well.