Irregular Defense x Noveske Rifle Barrel 11.5” 5.56mm 416R Stainless with 1:7 twist Individual serialized barrel for QC purposes Hand polished Noveske Match Chamber Mid length gas tube system Straight fluted between chamber and gas block Noveske marked gas block: Low profile, .750” journal, pinned to barrel M4 barrel extension w/extended hand polished feed ramps CGS SCI-SIX flash hider / suppressor mount Upper Receiver IRGLR DFNSE marked Noveske Chainsaw™ forged upper receiver from 7075-T6 aluminum w/extended feed ramps