09-01-2017, 08:52 PM
So far I haven't found that a 6.5 Grendel needs an adjustable gas block, if the gas port is properly sized. I've built two 20" uppers and just received a LaRue 18" upper. All run fine and are well behaved without an adjustable gas block.
Cliff
USN Ret., FPD Ret.
Dues Vult
USN Ret., FPD Ret.
Dues Vult

