Geissele Automatics Super Duty AR-15 Lower Receiver – Stripped Lower

Geissele Automatics Super Duty AR-15 Lower Receiver – Stripped Lower

The Geissele Automatics Super Duty Stripped Lower Receiver provides a precision-machined, mil-spec foundation for a custom AR-15 build. Made from 7075-T6 aluminum and finished in durable Type III hardcoat anodizing, this black lower is designed for builders who want trusted Geissele quality, standard component compatibility, and the freedom to configure a rifle to their specifications.

Precision-Machined AR-15 Build Foundation

The Super Duty stripped lower is machined to mil-spec dimensions for compatibility with standard AR-15 components. Its .250" takedown pin holes and mil-spec .154" trigger pin diameter support conventional lower parts kits and compatible upper receiver assemblies.

7075-T6 Aluminum with Hardcoat Anodized Protection

Constructed from 7075-T6 aluminum, this receiver balances strength with the weight characteristics expected from a quality AR-15 lower. A Type III hardcoat anodized finish helps protect the receiver from routine wear and corrosion while maintaining a clean black appearance.

Ready for a Custom Configuration

This receiver ships stripped, allowing builders to choose their preferred lower parts kit, trigger, pistol grip, buffer system, stock or brace where legally applicable, and compatible upper assembly. Safe/Fire selector markings follow standard AR-15 conventions for clear operation.

Key Features

• Geissele Automatics Super Duty stripped AR-15 lower receiver
• Precision machined from 7075-T6 aluminum
• Mil-spec receiver dimensions
• 5.56 NATO caliber marking
• Type III hardcoat anodized black finish
• .250" takedown pin holes
• Mil-spec .154" trigger pin diameter
• Safe/Fire selector indicators
• Ambidextrous configuration
• Compatible with mil-spec AR-15 components

Specifications

• Brand: Geissele Automatics
• Model: Super Duty
• Platform: AR-15
• Receiver Type: Stripped lower receiver
• Receiver Material: 7075-T6 aluminum
• Finish: Type III hardcoat anodized
• Color: Black
• Caliber Marking: 5.56 NATO
• Takedown Pin Hole Diameter: .250"
• Trigger Pin Diameter: Mil-spec .154"
• Ambidextrous: Yes
• SKU / Manufacturer Part Number: 05-2994-B

Compatibility

• Compatible with mil-spec AR-15 lower parts kits
• Compatible with AR-15 upper assemblies using standard .250" takedown and pivot pin dimensions
• Designed for compatible AR-15 fire-control components using .154" trigger and hammer pins
• Marked for 5.56 NATO builds

Not Compatible With

• AR-10, LR-308, or other large-frame rifle upper and lower receiver components
• Platforms that use non-standard receiver dimensions or pin sizes
• Complete rifle operation without separately selected compatible lower and upper components

Important Notes

• This is a stripped lower receiver. It does not include a lower parts kit, trigger, grip, buffer system, stock, magazine, or upper receiver assembly.
• Confirm compatibility of all build components before assembly.
• Follow all applicable federal, state, and local laws governing the purchase, transfer, assembly, and possession of firearms and receivers.

Frequently Asked Questions

What is included with this Geissele Super Duty lower receiver?

This product is a stripped lower receiver. Additional components such as the lower parts kit, trigger, grip, buffer system, stock, and upper receiver must be selected separately.

What platform is this stripped lower designed for?

It is designed for AR-15 builds using compatible mil-spec AR-15 components.

What caliber is marked on this receiver?

The receiver is marked 5.56 NATO.

What material is the Super Duty lower made from?

It is precision machined from 7075-T6 aluminum.

What finish does this lower receiver have?

It features a black Type III hardcoat anodized finish for durable wear and corrosion resistance.

Will standard AR-15 lower parts fit this receiver?

It is designed around mil-spec dimensions and is compatible with mil-spec AR-15 components. Always verify the specifications of individual parts before installation.

What takedown pin size does this lower use?

This lower receiver uses .250" takedown holes, consistent with standard AR-15 conventions.

Is the Geissele Super Duty lower ambidextrous?

Yes. This receiver is specified as ambidextrous.

Build Your AR-15 on a Geissele Foundation

With precision-machined 7075-T6 construction, mil-spec component compatibility, and a durable hardcoat anodized finish, the Geissele Super Duty Stripped Lower Receiver is a strong starting point for a purpose-built AR-15. Select the compatible components that match your intended configuration and build with confidence.

California Proposition 65 Warning: This product can expose you to chemicals known to the State of California to cause cancer and reproductive harm. For more information, visit www.P65Warnings.ca.gov.