The Geissele Super Duty AR-15 Complete Upper Receiver is designed for the most demanding operators who require the utmost in performance and reliability. This complete upper chambered in 5.56mm features a Nanoweapon coated Surefire Closed-Tine Flash Hider mounted to an 16” durable black oxide coated, CHF, Chrome Lined 1-7 twist barrel. The mid-length gas tube and Geissele Super Compact Gas Block with bomb-proof installation ensure reliability and optimal performance in extreme conditions.
Included is a brand new, 15” Super Modular Rail MK16 that mates to the upper via a center aligning tab removing any chance of rail rotation. This rail is a variant of the 13.5” SMR MK16, currently fielded by USASOC and renowned by operators for their performance and comfort. The Geissele Super Duty AR-15 Complete Upper Receiver is sure to provide many years of reliable service in even the most demanding environments.