• 16" Barrel
• 5.56 mm NATO
• Chromed Barrel Bore, Gas Key Bolt Carrier, Chamber
• Adjustable Gas Port
• 1-Piece Bolt Carrier
Upper assemblies may not be available for sale in all states and locales due to feature-based restrictions on firearms. Prior to purchasing, contact your local law enforcement agency to verify that this product may be legally purchased and possessed in your state and locale..