Description
Overview
The Geissele Super Duty MOD-1 Complete Upper Receiver 16″ SMR MK16 with HUXWRX Flash Hider QD is a premium AR-15 upper designed for dependable performance and versatile accessory mounting. It pairs a 16″ barrel with a lightweight SMR MK16 rail system and a quick detach HUXWRX flash hider so you get both effective ballistics and modular flexibility. Offered in both Black and Flat Dark Earth, this complete upper arrives assembled and ready to install on a compatible lower.
What It Does
This upper receiver group gives your rifle a balanced and capable configuration suitable for defensive, duty, and precision range use. The 16″ barrel supports strong velocity with common 5.56 NATO ammunition while the SMR MK16 rail provides continuous space for optics, lights, lasers, grips, and other accessories. A carbine length gas system is tuned for smooth cycling and consistent performance. A premium bolt carrier group and charging handle are installed to ensure dependable operation. The HUXWRX flash hider with quick detach capability lets you manage muzzle flash without committing to a permanent mounted device.
Features
- 16″ barrel tuned for balanced performance and velocity.
- SMR MK16 rail with modular attachment points.
- HUXWRX flash hider with quick detach capability.
- Premium bolt carrier group included for reliable function.
- Ambidextrous charging handle for flexible manipulation.
- Carbine length gas system tuned for smooth cycling.
- Continuous rail space for optics and accessories.
Specs
- Chambered in 5.56 NATO for broad ammunition compatibility.
- 16″ barrel with tuned carbine length gas system.
- SMR MK16 rail with generous continuous accessory space.
- Included HUXWRX quick detach flash hider.
- Complete with bolt carrier group and charging handle.
FAQ
Will this fit my AR-15 lower?
Yes. It is designed to mate with standard AR-15 pattern lowers using typical barrel extension and pin spacing.
Is this a complete upper?
Yes. It arrives fully assembled with all major components installed and ready to mount.
What caliber does it use?
It is chambered in 5.56 NATO, giving you access to a wide range of common ammunition.
Can I mount optics and accessories?
Yes. The SMR MK16 rail provides generous continuous space for sights, lights, lasers, grips, and other gear.
Does it cycle reliably?
Yes. The carbine length gas system and quality components support smooth cycling and consistent function.
What makes the flash hider special?
The HUXWRX flash hider offers quick detach capability so you can control muzzle flash while keeping flexibility for future accessory changes.
