AAC® MPW •Semi-auto Multi-Purpose Weapon (MPW) •Corrosion-resistant SCARmor™ chamber coating •Heat-treated & properly staked carrier w/Permatex® gasket-seal compound ensures no gas leakage key •Nickel-Boron coated carrier & cam pin •Shot-peened & black phosphated Mil-Spec Carpenter 158® bolt •“Full auto” bolt carrier group features an added base layer of high-phosphorous electroless nickel to ensure extreme corrosion protection •Custom 383K psi steel extractor spring & 300 ksi S2 tool steel extractor pin •Wide temperature range green O-ring (tested to -40°F) •Pictogram-marked lower features Geissele 2-stage trigger & Magpul® trigger guard •4150 CMV steel threaded barrel w/corrosion-resistant SCARmor™ bore & exterior coating •1:7" twist 5R rifling •AAC 51T Blackout™ flash hider •Knight’s Armament (KAC) 13.5" URX-3.1 free-float handguard rail system w/MIL-STD-1913 accessory attachment points •Magpul® CTR® stock w/6-position receiver extension & properly-staked castle nut •Magpul® MOE+™ pistol grip •Includes (1) PMag® Cal.: 5.56 NATO - Cap.: 30 - Brl.: 16"
