Geissele Super Duty Stripped Upper Receiver – Black

The Geissele Super Duty stripped upper receiver (brand part no. 08-245B) is machined from a 7075-T6 aluminum forging and finished in black, the same receiver Geissele uses on its own factory-built Super Duty rifles. Geissele machines its receivers to tolerances tighter than mil-spec requires, eliminating the wobble that shows up when mixing and matching upper and lower receivers from different makers. A Type III hardcoat anodize finish that exceeds MIL-A-8625 standards keeps the receiver protected against abrasion, and milled T-marks give it a distinctive, recognizable look. It ships stripped, without a forward assist, dust cover, or barrel nut, so builders can drop in exactly the internals they want.

Key Specifications

• Machined from a 7075-T6 aluminum forging for strength.
• Finished in Type III hardcoat anodize exceeding MIL-A-8625 abrasion resistance standards.
• Machined to tighter-than-mil-spec tolerances, eliminating wobble in mixed-brand builds.
• Finished in black.
• Compatible with mil-spec AR-15 lower receivers.
• Features milled T-marks for a distinctive look.
• Uses standard .250 inch takedown pin holes.
• Ships stripped, without a forward assist, dust cover, or barrel nut included.
• The same receiver Geissele uses on its own factory-built Super Duty rifles.

Frequently Asked Questions

Does this include a forward assist and dust cover? No, this is a stripped upper receiver, sold without a forward assist, dust cover, or barrel nut.

Will this fit a mil-spec lower? Yes, it’s compatible with mil-spec AR-15 lower receivers.

What makes this different from a standard mil-spec upper? Geissele machines it to tighter-than-mil-spec tolerances, which eliminates the wobble common in mixed-brand builds.

Buy the Geissele Super Duty Stripped Upper Receiver

Start your build on the same receiver Geissele uses in its own rifles. Order the Geissele Automatics Super Duty upper from our AR15 uppers lineup, and our Lubbock, Texas team can help confirm compatibility before it ships.