
With the Aero M4E1 Threaded Barreled upper receiver, BCM 18" 5.56 NATO 1:8 Rifle barrel and BCM M16 Bolt Carrier Group bolt carrier group.
Updated

With the Aero M4E1 Threaded Barreled upper receiver, BCM 18" 5.56 NATO 1:8 Rifle barrel and BCM M16 Bolt Carrier Group bolt carrier group.
Updated

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