Geissele Super Duty 5.56mm 16" Heavy Bbl (.750 Journal) DDC Stripped Upper Receiver (No Charging Handle, Muzzle Device, or BCG) 08-660S

The Geissele Super Duty 16" Heavy Barrel (.750 Journal) DDC Stripped Upper Receiver is a premium AR-15 upper foundation built around a robust cold hammer forged, chrome-lined 16-inch barrel with a .750″ gas journal and a 1:7 twist for versatile performance across 5.56 NATO ammunition. Featuring a mid-length gas system with a Super Compact gas block, this stripped upper arrives ready for your choice of handguard, bolt carrier group, charging handle, and muzzle device. Finished in Distressed Diamond Cut (DDC) and equipped with a Picatinny rail on the receiver, the 08-660S provides a rugged, optics-ready base for high-end custom rifle builds when mated to a compatible AR-15 lower. Built in the USA with attention to durability and accuracy, it’s ideal for precision-oriented, duty-grade, or long-distance AR configurations.