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About this part
The PSA 16" Mid-Length 5.56 NATO 1:7 Phosphate 13.5" Lightweight M-LOK Upper - With BCG & CH - 5165448217 is a 16" 5.56 / .223 upper receiver. One store lists it, Palmetto State Armory at $259.99.
Barrel: Chrome-moly vanadium steel, chambered in 5.56 NATO, with a 1:7 twist rate, M4 barrel extension, and a mid-length gas system. The A2-style profile barrel is phosphate coated and finished off with an .750 low-profile gas block, 13.5" PSA Lightweight M-Lok Free Float Rail, and an A2 flash hider. Upper: Forged 7075-T6 A3 AR upper is hard coat anodized black for durability. Featuring M4 feedramp cuts, these upper upper receivers are made for us right here in the USA. Bolt Carrier Group: Bolt is made of Mil-spec shot-peened Carpenter 158 steel, phosphate coated. Carrier is phosphate coated and chrome-lined 8620 steel. Machined steel gas key is chrome lined and fastened with properly staked grade 8 bolts. Charging handle included.