Geissele Super Duty MOD1 5.56 NATO 13.9" 1:7" CHF Chrome Lined Pinned & Welded Bbl DDC Complete Upper Receiver Group 08-546S

Geissele Super Duty MOD1 5.56 NATO 13.9" 1:7" CHF Chrome Lined Pinned & Welded Bbl DDC Complete Upper Receiver Group is built for durability and precision with a 13.9-inch Cold Hammer Forged barrel featuring a 1:7 twist rate. The barrel is chrome lined and finished in Desert Dirt Color (DDC) for enhanced corrosion resistance and a rugged tactical look. The muzzle device is pinned and welded to meet legal requirements while providing reliable performance. This upper includes a mid-length gas system designed to reduce recoil and improve cycling reliability.

The upper is equipped with Geissele’s Super Modular Rail (SMR) in 13.5 inches, providing extensive M-LOK attachment points for accessories. The complete upper receiver group includes Geissele’s Reliability Enhanced Bolt Carrier Group (REBCG) and an Airborne Charging Handle for smooth operation and ergonomic handling. Crafted from 7075-T6 aluminum with a Type 3 hardcoat anodized finish, this upper combines toughness and functionality in a lightweight design suitable for tactical and precision shooting applications.

• Caliber: 5.56 NATO
• Barrel Length: 13.9 inches
• Barrel Twist Rate: 1:7"
• Barrel Type: Cold Hammer Forged, Chrome Lined, Desert Dirt Color (DDC)
• Muzzle Device: Pinned & Welded
• Gas System: Mid-Length
• Rail: 13.5" Super Modular Rail (SMR) with M-LOK
• Includes Reliability Enhanced Bolt Carrier Group (REBCG)
• Includes Airborne Charging Handle
• Upper Receiver: 7075-T6 Aluminum, Type 3 Hardcoat Anodized