Geissele Automatics Super Duty MOD1 5.56 NATO Complete Upper Receiver - 16" - Black

The Geissele Super Duty MOD1 Upper Receiver is a complete upper receiver for AR-15 platform rifles, chambered in 5.56 NATO. This upper features a 16” Geissele cold hammer forged (CHF) barrel with a chrome lining and a 1:7 twist rate. The barrel is equipped with a Nanoweapon-coated HUXWRX Flash Hider-QD muzzle device.

The Super Duty MOD1 upper utilizes a Geissele length gas system with a Super Compact Gas Block for optimal performance and reliability. It also includes a 15” Super Modular Rail MK16, known for its rigidity and comfort, which attaches securely to the upper receiver with a center alignment tab.

Features:

• Caliber: 5.56 NATO
• Barrel: 16" Geissele CHF chrome-lined, 1:7 twist barrel
• Gas System: Geissele length with Super Compact Gas Block
• Rail: 15" Super Modular Rail MK16
• Upper Receiver: Super Duty Upper with enhanced cam pin cut-out
• Bolt Carrier Group: Nanoweapon coated Reliability Enhanced BCG with Geissele Stressproof Bolt
• Muzzle Device: HUXWRX Flash Hider-QD 556
• Charging Handle: Airborne Charging Handle
• Weight: 4 lbs 5 oz
• Overall Length: 25 3/8"
• Color: Black

The core of the upper is the Geissele Reliability Enhanced Bolt Carrier Group (BCG). This Nanoweapon coated BCG features a chrome-lined gas key, an H13 steel cam pin for enhanced durability, and extended upper rails for improved feeding reliability. The BCG also includes the Geissele Stressproof Bolt, which has undergone rigorous inspection, testing, and coating for maximum performance.