10.5″ Railed Upper Build Kit with USB

Includes:

– Barrel
– Material: 4150 CMV
– Caliber: 5.56 NATO
– Twist: 1:7
– Length: 10.5″ (11.5″ if 11.5″ Build Kit is Selected)
– Gas System: Carbine
– Finish: Nitride
– Thread: 1/2-28
– Extension: M4
– Upper Receiver
– Material: 7075-T6 Forged Aluminum
– Type of Coating: Type III Hard Coat Anodizing
– Additional Features: Assembled with Forward Assist and Dust Cover, M4 Feed Ramps
– Handguard
– Material: Lightweight Aluminum
– Type: M-lok Rail
– Bolt Carrier Group
– Bolt Material: Mil-spec shot-peened Carpenter 158 steel
– Gas Key: Secured with grade 8 fasteners and staked per mil-spec.
– Bolt Carrier Material: Parkerized outside, chrome lined inside
– Lower Parts Kit
– Features: Enhanced Polished Trigger (EPT)
– Safety Selector, Detent, Spring
– Magazine Catch, Button, Spring
– Bolt Catch, Buffer, Spring, Buffer
– Takedown, Pivot Pins, Springs [2], Detents [2]
– Buffer Retainer Pin, Spring
– Magpul MOE Grip, Trigger guard
– Buffer Tube
– Material: 7075 mil-spec carbine receiver extension
– Type: 5-position adjustable
– Additional Features: Castle Nut, Latch Plate
– Recoil System
– Buffer: Standard Carbine Buffer
– Spring: Carbine Length Spring

*Brace not included