The Geissele Automatics Duty Complete AR-15 Upper Receiver Assembly features an 16” cold hammer forged chrome lined barrel with a mid-length gas system for reliable function. The barrel features a Manganese Phosphate coating and is threaded 1/2×28, so you can use your favorite muzzle device. The upper receiver is forged from 7075-T6 aluminum and hardcoat anodized desert dirt color for protection from corrosion and wear. The 15” SMR MK16 free float handguard features M-LOK attachment slots on 7 sides for plenty of room to customize your set up. This AR-15 barreled upper receiver group does not come with a charging handle or bolt carrier group.
Features:
- Forged 7075-T6 aluminum receiver
- Black hardcoat anodized
- 16” cold hammer forged chrome lined barrel
- Chambered in 5.56 with a mid-length gas system
- Threaded 1/2×28
- 15” SMR MK16 free float M-LOK handguard
Note: Geissele’s Desert Dirt Color (DDC) finish refers to a variety of shades of desert terrain designed to better break up a rifle’s outline. These colors can vary drastically even between products from the same batch and ARE NOT intended to color match. Per Geissele Automatics, the only way to receive a uniform color across all parts and accessories is to have them painted with a different finish such as DuraCoat or Cerakote.

