Caliber: 5.56mm NATO
Contour: Light Contour
Material: 4140 Chrome-Moly Steel
Chrome Lined: No
Gas System: Carbine
Muzzle Thread: Yes
Other: A2 Flash Hider, A3 Upper Receiver, Hard Coat Anodized Per Mil Spec, Complete Bolt Carrier Assembly, Single Rail Gas Block, GlacierGuards™ Handguards
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