Geissele Super Duty Upper 5.56mm 16" Black

Inter-Store Transfer
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Geissele's Super Duty upper receiver groups features the latest in weapons technology. This complete 16" upper receiver includes a 16" CHF, Chrome-lined barrel, Manganese Phosphate with a 1:7" twist and includes a Geissele Sparkout Flash Hider. These barrels are precision machined and cold hammer forged in-house at Geissele's North Wales, PA facility. The 16" model uses a mid-length gas system and utilizes a Super Compact Gas Block with bomb-proof installation for reliability and optimal performance.

The Super Duty uses a 15" MK16 Modular Rail with M-LOK compatibility and features an alignment tab that mates to the upper receiver. This rail is a variant of the same rail used by USASOC and renowned operators.

Also included is a Geissele REBCG with a Nanoweapon coated BCG for exceptional wear and corrosion resistance. The carrier is constructed from 8620 steel and uses a staked, chrome-lined gas key. The bolt is made from Carpenter 158+ which is forged for a stronger and fatigue resistant structure. Each bolt is inspected, high pressure tested and mag particle inspected.

This is a complete upper receiver and will mount to AR15/M4 lower receivers.

Specifications
Caliber	5.56mm/.223 Rem.
Barrel Length	16"
Barrel	Geissele CHF, Chrome-Lined
Twist	1:7"
Gas System	Mid-Length, Direct Impingement
Muzzle	Geissele Sparkout Flash Hider
Gas Block	Super Compact
Rail	15" SMR MK16, MLOK
Bolt Carrier	Nanoweapon Reliability Enhanced BCG
Bolt	Geissele Stressproof Bolt with Asymmetric Cam Pin
Receiver	Super Duty w/ cam pin cut out
Charging Handle	Airborne
Color	Black