AR 15- inch chrome moly phosphate spiral fluted barrel
shoots both 5.56 and .223 ammo
*Rifle gas length
*.750 gas block ( not included)
*1/2x28 threaded barrel
*m4 feed ramps
*spiral fluted
*Match grade 4150V barrel
-Picture shows an 18 inch barrel but you will received a 20 inch with the rifle gas system
