The Geissele Super Duty Complete AR-15 Upper Receiver comes with more options than a 1970s Cadillac, including a Surefire closed tine Warcomp, Geissele's Super Modular Rail M-LOK® handguard, and their ambidextrous Airborne charging handle. A tooth in the top rear of the SMR handguard mates with a notch in the upper receiver to prevent unwanted handguard rotation that could compromise optic and/or backup sight alignment.
Included is a brand new, 10.5” 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.
Also included is the Geissele REBCG, Reliability Enhanced Bolt Carrier Group. This Nanoweapon coated BCG is machined from mil-spec 8620 steel, with a properly torqued and staked, chrome lined gas key. The Cam Pin is machined from advanced, medical steel known as H13 which is also coated with Nanoweapon for maximum corrosion and wear resistance. The REBCG also features extended upper rails, providing greater stability and dramatically increasing feeding reliability.
The REBCG comes with the Geissele Stressproof Bolt. Made from Carpenter 158+, directly developed with Carpenter Steel metallurgists to create a material that is cleaner and has less impurities. This makes the Geissele Stressproof bolt stronger and more fatigue resistant. The Geissele Stressproof bolt is also forged, not machined from barstock. This allows Geissele to optimize the grain structure of the steel to yield a bolt capable of 5 times the life of a mil-spec bolt. Each bolt is rigorously inspected, high pressure tested, mag particle inspected and Nanoweapon coated.
Geissele Nanoweapon, also known as Picatinny DSL (Durable Solid Lubricant) is exclusive to Geissele Automatics. It offers a level of corrosion, wear and abrasion resistance that is currently unmatched among firearm coatings. Nanoweapon is applied at low temperatures as to not affect the metallurgy of the part being coated. It has a surface hardness roughly equivalent to synthetic diamond. It is harder than sand, which allows Nanoweapon to easily reject carbon. This makes cleaning a breeze and allows the firearm to operate normally with less lubrication.
All of these technologies and advancements combine to bring to market a true next-gen upper for the AR-15 platform. The Super Duty Complete Upper from Geissele Automatics offers unmatched performance, accuracy and reliability.
- LENGTH: 11.5"
- CALIBER: 5.56MM
- COLOR: DDC
- RECEIVER: Super Duty Upper w/ cam Pin cut-out
- BOLT CARRIER GROUP: Nanoweapon Reliability Enhanced BCG INCLUDED
- BOLT: Geissele Stressproof Bolt with Asymmetric Cam Pin
- RAIL: 10.5" SMR MK16
- BARREL: 11.5" Geissele Barrel, CHF, Chrome Lined, 1-7 Twist.
- GAS SYSTEM: Carbine Length
- GAS BLOCK: Super Compact Gas Block
- CHARGING HANDLE: Airborne Charging Handle INCLUDED
- MUZZLE: Nanocoated SUREFIRE WARCOMP INCLUDED
What is Geissele Nanoweapon?
Geissele Nanoweapon (also known as Picatinny DSL) is a family of Durable Solid Lubricant coatings which was developed by ARDEC. It is available exclusively from Geissele Automatics. We continued the development of Picatinny DSL so that its level of corrosion, wear and abrasion resistance is currently unmatched among firearm coatings. Nanoweapon is applied at low temperatures so that the underlying metallurgy of the part is non effected by the application process. Our coating also has a surface hardness roughly equivalent to synthetic diamond. This makes Geissele Nanoweapon harder than sand, easily rejecting carbon and making cleaning a breeze, on top of allowing the firearm to operate normally with less lubrication.
5 STAR 100% SUPERB
It was a long wait to receive it but definitely worth it. Shoots tight groups and looks sweet. It's currently my favorite AR. By Clint on 3/5/20
5 STAR 100% EXCELLENT PIECE OF GEAR
I waited impatiently like many for this upper and when I got I understood the wait was worthy. I put it together with a geissele lower and voila, the perfect combination. Although I wanted to go shoot right of way, I decided to wait and put it through its paces in a carbine class, so I wanted again. I finally took the class and I put approximately 500 rounds which it might be not a lot by many but it was good baseline to measure reliability and performance. Well, I was definitely impressed with it performance, this upper felt like many of my mid-length uppers, not overly gassy and very soft to shoot. I didn't get any malfunctions altogether, it fed and ejected reliably. Overall, this is an excellent piece of gear that I would recommend anyone that is serious in taking training and using their gear a lot. By Ozzy on 2/23/20
5 STAR 100% EXCELLENT UPPER, HIGH QUALITY.
This is a very nice upper, nice BCG. My only complaint is that they seem to rocksett the flash hider on. I wish they wouldn't do this because its really hard to get some of them off, and most users nowadays use other cans. By S on 2/11/20