Geissele Super Duty 11.5" Complete Upper

The Geissele Super Duty 11.5" complete upper represents the pinnacle of short-barrel AR-15 design, incorporating proprietary technology developed for professional end-users. This configuration balances velocity retention with maneuverability, making it ideal for close-quarters applications, vehicle operations, and suppressed shooting. The 11.5" barrel length provides significantly better ballistics than 10.3" alternatives while remaining compact enough for confined spaces.

Geissele's cold hammer forged barrel features chrome lining for extended service life and is precision-manufactured at their facility in North Wales, Pennsylvania. The proprietary Geissele-length gas system with carbine-length dimensions uses a Super Gas Block with precisely calculated .067" gas port sizing to minimize felt recoil while maintaining reliable cycling under adverse conditions. This carefully balanced gas system works exceptionally well with suppressors, a critical consideration for this barrel length.

The complete upper includes Geissele's Reliability Enhanced Bolt Carrier Group (REBCG) featuring their Stressproof bolt manufactured from Carpenter 158+ steel—a proprietary material developed in collaboration with Carpenter Steel metallurgists for superior strength and fatigue resistance. The Nanoweapon coating on the BCG provides diamond-like hardness, excellent carbon rejection, and reduced lubrication requirements. The 10.5" MK16 M-LOK rail with center tab and stainless steel QD inserts completes this premium package.