The Aero Precision AR-15 Lower Parts Kit (brand part no. APRH100385C) gives builders the mil-spec-dimensioned hardware needed to complete a custom AR-15 lower from the ground up, sold without a fire control group or grip so you can finish the build to your own spec. Aero Precision has built a strong reputation among AR builders for consistent tolerances and correct component interface, and this kit includes the takedown and pivot pin springs and the rest of the small hardware a lower needs to function. It’s a solid foundation piece for anyone assembling a receiver from parts.

Key Specifications

• Built to mil-spec dimensions and coating for correct component interface across compatible parts.
• Sold explicitly without a fire control group or pistol grip, so you can select your own.
• Finished in black to match standard AR-15 hardware.
• Shipping weight of approximately 0.17 pounds, consistent with a small-parts kit.
• Manufactured by Aero Precision, a major AR-pattern receiver and parts maker.
• Ships as a complete small-parts kit rather than individual loose pieces.
• Includes the hardware needed to complete a standard lower build, minus the trigger and grip.
• Aero Precision builds this kit to the same tolerances used across its receiver and upper lineup.
• Sold without a fire control group so builders can pair their preferred trigger.

Frequently Asked Questions

Does this kit include a fire control group or grip? No — both are sold separately so you can choose your own trigger and grip.

Is this kit mil-spec? Yes, Aero Precision builds it to mil-spec dimensions and coating.

Buy the Aero Precision AR-15 Lower Parts Kit

Complete your custom AR-15 build with parts from Aero Precision. Order it from our Lubbock, Texas gun shop for fast, insured shipping, and see our full AR lower parts kit selection.