556/223 100 rounds through it, no malfunctions.
Aero M4E1 Receivers, BCM QRF Handguard, Aero Full Auto Rated BCG Nitride, Criterion Core 16' barrel Midlength gas, Magpul Gen 3 Rear BUS, Troy Front Battle Sight. Mag is not included. 

Gray Cerakote done by Spartan Arms

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