Geissele Super Duty AR-15 Complete Upper Receiver 5.56 Mid-Length – 40mm Green – 14.5″


  • Forged 7075-T6 aluminum receiver
  • 16” cold hammer-forged chrome lined barrel
  • Chambered in 5.56 with a mid-length gas system
  • SureFire Closed Tine flash hider
  • 15” SMR MK16 free float M-LOK handguard
  • Airborne charging handle
  • Nano coated BCG
  • 40mm Green Finish


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SKU08-219-40G Category

The Geissele Super Duty Complete Upper Receiver is the latest in weapon technology, offering superior performance and durability. This complete upper receiver is chambered in 5.56mm and features a Nanoweapon coated Surefire Closed-Tine Flash Hider, mounted to a 16” 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 Complete Upper Receiver is the perfect choice for those who demand the very best.


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