4″ .40 S&W AR-15 PCC Complete Upper Receiver
Product Specs:
- 7075-T6 Billet PCC Cut Upper Receiver
- 4.2″ Mlok free floating rail
- 4″(OAL) .40 S&W barrel
- 1:16 Twist
- 4150 Steel
- Nitride coated
- 5/8×24 slim flash can
- This upper comes complete with a nitride coated .40S&W bolt carrier group (BCG) and a standard charging handle.
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