About Our Barrels
The custom machined
match barrels used in RGUNS rifles and uppers are made from 4150
chrome-moly vanadium steel manufactured in the USA. Each 5.56 NATO
barrel is properly head spaced with an M4 feed ramp extension installed.
Barrels are particle tested, air gauged, concentrically cut and, where threaded, muzzle
threaded ½ -28 R.H. twist to accept flash hiders/suppressors,
stressed relieved, turned on center to prevent accuracy robbing
distortion when the barrel heats up, and hardened to 26-33 Rc giving
the barrel a long life.
Each barrel has an eleven degree crown, polished chamber and lapped
bore, as well as a pulled-button rifling, producing a superbly
accurate bore diameter with uniform rate of twist. Fluted models
feature unique fluting designs to improve rigidity and aid in barrel