M4E1 Complete Upper Features

This Complete Upper includes the Quantum Handguard! Key features include the addition of built in anti-rotation tabs, removable 4-slot picatinny rail section for front sight and a 7 mounting surface for accessories. The barrel has a length of 8″, a threaded muzzle of 5/8×24 Threaded, and 4150 Crome Moly Vanadium material. This pistol length barrel also features an M4 Barrel Extension and is chambered in .300 Blackout. It accepts standard AR15/M16 components and comes assembled with a port door and forward assist installed. The handguard mounting platform is forged into the receiver. 

M4E1 Complete Upper Specifications

Barrel Length: 8″
Twist: 1 in 7
Muzzle: 5/8×24 Threaded
Material: 4150 Crome Moly Vanadium
Finish: QPQ corrosion resistant finish both inside and out
Gas Block: .750
Gas Port: .109
Gas System Length: Pistol
Weight: 18oz
M4 Barrel Extension: Yes
Caliber: .300 Blackout
Material: 7075 T6 Aluminum