R Guns M4 5.56/.223 Rifle
FFL Required. Not for sale in CA, CT, MA, NJ, & NY. Not for sale with magazines in MD.
New R Guns M4 5.56x45/.223 caliber semi-automatic Rifle. Features a 16" 4150 chrome-moly vanadium steel 1:9 twist, air gauged, MP tested barrel. M4 feed ramp extension installed. Includes 30rd magazine and plastic hard carry case.
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/.223 barrel is properly head spaced with an M4 feed ramp extension installed.
Barrels are particle tested, air gauged, concentrically cut and 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 cooling.