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

The Geissele Super Duty MOD1 5.56 NATO 12.5" upper is a compact, purpose-built upper receiver group for shooters who need maximum reliability in minimum size. The Geissele 12.5 upper hits the sweet spot between the maneuverability of an SBR and the performance of a longer barrel — delivering serious capability in a configuration that handles fast in tight environments without sacrificing the component quality that Geissele builds into everything they make.

The Geissele Super Duty 12.5 barrel is cold-hammer forged with a 1:7-inch twist rate and a chrome-lined bore that extends barrel life and resists fouling that accumulates during sustained high-round counts. The 12.5-inch length extracts meaningful velocity from the 5.56 cartridge in a package that keeps the overall rifle compact and maneuverable for the close-quarters and duty applications this upper was designed around. The barrel is built to Geissele's exacting standards for accuracy and durability, holding up to serious professional use.

The Geissele AR15 Reliability Enhanced Bolt Carrier Group on the 08-545B runs Nanoweapon coating throughout with a chrome-lined gas key that is properly staked and torqued for maximum operational longevity. The Airborne Charging Handle delivers improved grip and smoother manipulation under stress and with gloves — a practical detail that matters in the duty and defensive applications this upper was built for.

The Geissele Super Duty upper MK16 Super Modular Rail offers robust M-LOK attachment points in a slim profile that works naturally with short-barreled configurations without adding unnecessary bulk. The black anodized receiver finish ties the complete assembly together cleanly.

Find the Geissele Super Duty MOD1 12.5" Black Complete Upper Receiver Group 08-545B right here at EuroOptic.