Geissele Super Duty MOD1 5.56 NATO 14.5" 1:7" CHF Chrome Lined Pinned & Welded Bbl DDC Complete Upper Receiver Group is built for reliability and precision, featuring a 14.5-inch Cold Hammer Forged chrome-lined barrel with a 1:7 twist rate. The barrel is pinned and welded with a muzzle device for compliance and durability. This upper is finished in Desert Dirt Color (DDC) for tactical concealment and durability in harsh environments. It is designed with a mid-length gas system and Geissele’s Super Compact Gas Block to ensure smooth and consistent cycling. This complete upper group comes fully assembled with Geissele’s REBCG (Reliability Enhanced Bolt Carrier Group) for maximum reliability and durability under demanding conditions. The 13.7-inch MK16 M-LOK handguard provides extensive accessory mounting options while maintaining a lightweight profile. It also includes the Airborne Charging Handle for enhanced ambidextrous operation and easy manipulation. Constructed from 7075-T6 aluminum with a Type 3 hardcoat anodized finish, this upper receiver group offers excellent strength and corrosion resistance. Caliber: 5.56 NATO Barrel Length: 14.5 inches Barrel Twist Rate: 1:7" Barrel Type: Cold Hammer Forged, Chrome Lined, Pinned & Welded Gas System: Mid-Length with Super Compact Gas Block Rail: 13.7" MK16 M-LOK, Desert Dirt Color (DDC) Includes REBCG (Reliability Enhanced Bolt Carrier Group) Includes Airborne Charging Handle Upper Receiver: 7075-T6 Aluminum, Type 3 Hardcoat Anodized Geissele Automatics Geissele Super Duty MOD1 5.56 NATO 14.5" 1:7" CHF Chrome Lined Pinned & Welded Bbl DDC Complete Upper Receiver Group 08-547S