I had my gunsmiths taper pin on gas blocks to Centurion Arms premium 14.7" CHF barrels, and have URX lock nuts read to go!
All you have to do is pick a URX rail system, and a muzzle device for pinning and welding!
Available Here!

Available Here!
All you have to do is pick a URX rail system, and a muzzle device for pinning and welding!
Available Here!

Available Here!