Advanced Armament Corp. Mpw Upper 12.5" 300Blk

AAC® MPW UPPER ASSEMBLY


•Multi-Purpose Weapon (MPW) upper is ready to drop onto an AR15 M16 or M4 lower   •Corrosion-resistant SCARmor™ chamber coating   •Heat-treated & properly staked carrier key w/Permatex® gasket-seal compound ensures no gas leakage   •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)   •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) 10.75" URX-3.1 free-float handguard rail system w/MIL-STD-1913 accessory attachment points   •NOTES: All Uppers are designed for use w/carbine receiver extensions & standard GI buffer springs; Uppers w/12.5" Barrels require H2 buffers 


Cal.: .300 AAC Blackout   -   Brl.: 12.5"