Geissele Automatics Duty AR-15 Complete Upper Receiver Carbine - 40mm Green - 11.5"
All Geissele upper receivers
Click to see full view
Geissele
Overview
The Geissele Automatics Duty AR-15 Complete Upper Receiver Carbine features an 11.5-inch barrel, making it well-suited for close-quarters engagements while maintaining accuracy at short distances. The complete assembly is ready to install on any AR-15 platform and comes in a rugged OD Green finish, providing both functionality and a distinctive look. This upper receiver is commonly used in builds chambered for 5.56 NATO, ideal for tactical applications and home defense setups.
Specifications
Geissele Automatics Duty AR-15 Complete Upper Receiver Carbine - 40mm Green - 11.5"
Build history on GunPartPicker
Builders on GunPartPicker first added the Geissele Automatics Duty AR-15 Complete Upper Receiver Carbine - 40mm Green - 11.5" to a build in February 2026.
It was out of stock everywhere we track for all of September 2026, and today none of the 2 retailers we track has it in stock right now. Listed prices start at $1,205 at AR15 Discounts for when it comes back.
Updated · from real builds on GunPartPicker · Prices checked · refreshed daily across 37 retailers
Not sure which upper receiver to pick?
We ranked every upper receiver by how often it shows up in real builds on GunPartPicker.
Read the guide: Most Popular AR-15 Upper Receivers →Check it against the live catalog:
Frequently Built With
The part most often added in each category by the builds that include this one
Griffin Armament MK2 Ambi Stripped AR-15 Lower Receiver - Ambidextrous Controls - Flared Magwell - Warhawk Green - MK2ALWHG
Radian Raptor Charging Handle & Talon Safety Selector Combo - OD Green
Emissary Handbrake M-LOK - ODG
CMMG AR15 Ambi Mag Catch, Black - 55AFF6E
Magpul MOE-SL Grip Polymer O.d. Green
Radian Weapons Talon Ambidextrous Safety Selector KIT - 4 Levers - OD Green
No reviews yet. Be the first to review this product!