Rifle & Pistol BarrelsStandalone barrels for AR-15, AR-10, and bolt-action builds. Button-rifled 4150 chromoly vanadium (CMV), nitride or stainless, lengths from 7.5″ pistol to 24″ rifle. Profiles: HBAR, M4, pencil, government, stainless medium contour. Chamberings: 5.56 NATO, .300 BLK, 7.62×39, 6.5 Grendel, 6.8 SPC II, .308 Win, 6.5 Creedmoor, .223 Wylde.Related CategoriesAR-15 UppersPartsAR-10 UppersEvery firearm on this page ships direct from our Stafford, Texas facility to the transferring FFL dealer of your choice. California, New York, New Jersey, and Massachusetts-compliant configurations available on request. NFA items (suppressors, SBRs) require Form 4 processing through your transferring dealer.
5.56 NATO
Sig MCX-SURG Suppressed Upper Receiver Group, Fits to AR-15 Lower, 11.5″ Barrel, 5.56 NATO