The Geissele Super HBAR MOD1 14.5" Complete Upper in Distressed Diamond Cut (DDC) is a premium heavy-barrel AR-15 upper assembly engineered for rugged durability, heat management, and sustained accuracy. Built around a cold hammer forged, chrome-lined 14.5-inch barrel with an .812? gas journal and 1:7 twist, it’s designed to handle extended precision use with minimal barrel whip. The mid-length gas system with Super Compact gas block enhances smooth cycling, and the MK16 M-LOK free-float rail provides a rigid platform for optics and accessories. With a DDC finish and full Picatinny rail surfaces, this upper is optics-ready and compatible with any AR-15 lower. Sold with a BCG and charging handle, the 08-616S offers core components for a robust custom rifle build centered on reliability and modularity. Geissele Super HBAR MOD1 Complete Upper 5.56mm 14.5" Bbl (.812 Journal, 5/8x24) P& W DDC Complete Upper Receiver 08-616S