Geissele Automatics AR-15 Super Duty Rifle Build Kit 5.56MM
The Geissele Super Duty Build kit features the quality and workmanship you've come to expect from the Geissele name.
The complete upper, chambered in 5.56mm, features the Geissele Sparkout Flash Hider mounted to an in-house durable manganese phosphate coated, Cold Hammer Forged, Chrome Lined, 1-7 twist Geissele barrel. Geissele barrels are precision machined, utilizing the highest quality materials at their state of the art facility in North Wales, PA. The Geissele Length gas system and Geissele Super Compact Gas Block (with bomb-proof installation) ensures reliability and optimal performance in extreme conditions and heavy use.
The included MK16 Super Modular rail mates with the upper receiver via a center aligning tab, removing any chance of rail rotation. This MK16 rail is a variant of the SMR MK16 currently fielded by USASOC and renowned by operators for their performance, comfort, and adaptability.
At the heart of this upper receiver group is the Geissele REBCG (Reliability Enhanced Bolt Carrier Group). This Nanoweapon coated BCG features a properly torqued and staked, chrome lined gas key. The Cam Pin is machined from advanced tool-steel, which is also coated with Nanoweapon for maximum corrosion and wear resistance. The REBCG features extended upper rails, providing greater stability and dramatically increasing feeding reliability. Additionally, the REBCG comes with the Geissele Stressproof Bolt, which is manufactured from Carpenter 158+ steel. Directly developed with Carpenter Steel metallurgists to create a material that is cleaner and has less impurities, the Stressproof bolt is stronger and more fatigue-resistant than you average bolt. The Geissele Stressproof bolt is also forged, not machined from barstock. This optimizes the grain structure of the steel to yield a bolt capable of five times the lifespan of a mil-spec bolt. Each bolt is rigorously inspected, high-pressure tested, mag particle inspected, and Nanoweapon coated.
The Geissele Ultra Duty Lower Parts Kit is made for the most demanding operators and includes all the internal parts necessary to complete or rebuild your lower receiver. This top-tier LPK features proprietary Geissele designs, machined with great care at their facility located in North Wales, PA. Key components are made from Stainless Steel, which offers a much longer life-span and a much lower chance of rusting or failing in extreme conditions or under heavy use. It includes the Maritime Bolt Catch, famous for its aggressive texturing and extended paddles, and the Ambidextrous Super Configurable Safety, which features the ability to easily and securely swap and exchange the safety levers, plus provides the end user a satisfying and positive tactile feedback when the safe or fire position is engaged. The takedown pins and mag release button feature the same “tank treading” as the Maritime Bolt Catch, giving your rifle a tasteful and
