sarco 20" heavy barrel blank

[aephilli822]

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.

any accuracy impressions to report?