Geissele Super Duty MOD1 5.56 NATO 12.5" 1:7" CHF Chrome Lined Bbl Black Complete Upper Receiver Group 08-545B

Geissele Super Duty MOD1 5.56 NATO 12.5" 1:7" CHF Chrome Lined Barrel Black Complete Upper Receiver Group 08-545B is engineered for shooters who need a rugged, compact upper that performs reliably in high-stress environments. This complete upper features a 12.5-inch cold hammer-forged barrel with a 1:7 twist rate and a chrome-lined bore for extended barrel life and resistance to fouling. The barrel is constructed to Geissele’s exacting standards, providing excellent accuracy and durability. It also includes the Geissele Reliability Enhanced Bolt Carrier Group, which is Nanoweapon coated and paired with a chrome-lined gas key to maximize operational longevity.

This upper is equipped with the Airborne Charging Handle for improved grip and smoother manipulation, even under stress or when wearing gloves. It also features the MK16 Super Modular Rail, offering robust M-LOK attachment points and a slim profile ideal for short-barreled builds. The black anodized receiver ties it all together for a clean, professional finish. Whether for duty use or personal defense, this upper delivers dependable performance and premium materials in a compact configuration.

• Caliber: 5.56 NATO
• Barrel Length: 12.5"
• Barrel Profile: Geissele Profile
• Barrel Construction: Cold Hammer Forged (CHF)
• Barrel Finish: Chrome Lined
• Barrel Twist Rate: 1:7
• Bolt Carrier Group: Geissele Reliability Enhanced BCG (Nanoweapon-coated, Chrome-lined gas key)
• Charging Handle: Airborne Charging Handle
• Handguard: MK16 Super Modular Rail
• Receiver Finish: Black Anodized
• Part Number: 08-545B