• Chamber– 5.56 NATO
• Barrel Twist– 1×7
• Barrel Thread– 1/2 x 28
• Barrel Steel –
• Flutes – NONE
• Flash Hider – A2
• Handguard – 2 Piece Carbine
• Gas Block– .750 Rail Height Gas Block
• Gas System – Carbine Length
• Upper Receiver – M4 Flat Top Upper
• Bolt Carrier Group– Included
• Charging Handle– Included

Warranty: 1 year warranty against manufacturer defect.

***Ammunition Notification***
JSE Surplus test fires every custom upper to verify cycling. We do not guarantee cycling with all ammunition due to vast differences in the quality of ammunition. We will only warranty cycling with US made ammunition. We will not warranty cycling with imported, steel cased or reloaded rounds. Some of the non-warrantied ammo includes: Tula, Wolf and Perfecta.