The Super Duty MOD1 Heavy Barrel (HBAR), takes the Super Duty platform to the next level, with a heavy profile barrel that can handle sustained rates of fire while maintaining the accuracy and reliability the Super Duty is known for.image

The Geissele Super Duty MOD1 16" Heavy Barrel Complete Upper Receiver in Distressed Diamond Cut is a premium AR‑15 upper assembly built around a rugged cold hammer forged, chrome‑lined 16in barrel with a .750‑inch gas journal and a 1:7 twist for broad ammunition compatibility and enhanced heat capacity. Featuring a mid‑length gas system with a Super Compact gas block and an MK16 M‑LOK free‑float rail, this upper is optics‑ready with a full Picatinny rail for sights and accessories.