PTAC 16" M4 5.56 NATO Slick Side 1:7 Nitride Rifle Kit - 7780411

  Barrel: This Nitride 4150V barrel is chambered in 5.56 NATO with a 1:7" twist, M4 barrel extension, and a carbine-length gas system. It is finished off with a PSA standard handguards, and an A2 Flash Hider. Upper: The forged 7075-T6 A3 AR upper "slick side" which has no dust cover or forward assist provisions and is hard coat anodized. These uppers are made for us right here in the USA by a mil-spec manufacturer.  May or may not have T-marks Bolt Carrier Group: Phospahte coated, shot peened, Carpenter 158 bolt.  Chrome lined, phosphate coated 8620 full auto profile steel carrier.  Chrome lined gas key secured with properly staked grade 8 screws. PSA Freedom lower build kit comes with a classic lower build kit with single stage mil-spec style trigger, A2 grip and M4-style stock. Kit incudes everything needed to build your complete rifle except for the stripped lower receiver.   * Signature required for delivery