• Chamber – 5.56 Nato
• Barrel Twist – 1×8
• Barrel Thread – 1/2 x 28
• Barrel Steel –  4150 Chrome Moly Vanadium – Parkerized
• Flash Hider – A2
• Handguard – 12″ Billet M-LOK Free Float
• Gas Block – .750 Micro
• Gas System – Carbine Length
• Upper Receiver – Billet M4 Flat Top
• 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.