Alex Pro Firearms Ar10 Lower Parts Kit .308 Win Black

An AR-10 lower parts kit for .308 Winchester builds saves you time sourcing individual components and ensures you have the essentials to complete your receiver. The Alex Pro Firearms AR-10 Lower Parts Kit in black comes with the critical small parts that transform a stripped lower into a functioning receiver—pivot pins, takedown detents, mag catch assembly, trigger and hammer springs, and more. Whether you're assembling your first .308 AR platform rifle or building a dedicated long-range or hunting rig, this kit consolidates the fiddly bits that are easy to lose and tedious to hunt down separately.

AR-10 builds require specific compatibility with .308 Winchester platform lowers, and this kit is engineered for that spec. Black anodizing matches most modern tactical and hunting builds. Having a complete lower parts kit on hand means you can focus on the upper, barrel, and optics—the parts that define your rifle's accuracy and capability—without getting hung up on springs, pins, and detents.

Alex Pro Firearms focuses on AR platform components, and this kit reflects that specialization. If you're familiar with AR-15 builds, AR-10 assembly follows the same logic, though the parts are larger and heavier-duty to handle .308 pressures and recoil. This kit gives you the foundation to build on.

Key Features

• Complete lower parts kit—front and rear pivot pins, takedown detents and pins, mag catch assembly with spring and button, trigger and hammer springs, and related components
• Designed for .308 Winchester AR-10 platform lowers
• Black finish for modern aesthetic and corrosion resistance
• Consolidates small parts in one purchase, reducing lost-parts frustration

Specifications

Frequently Asked Questions

What parts are included in this AR-10 lower parts kit?

The kit includes front and rear pivot pins, takedown detents, takedown pins, magazine catch, mag catch button, mag catch spring, washer, trigger spring, hammer spring, and additional components necessary to complete a .308 AR-10 lower receiver.

Will this kit work with my AR-15 lower?

No. This is specifically designed for .308 Winchester AR-10 platform lowers. AR-15 and AR-10 parts are not interchangeable due to size and pressure differences. Make sure your stripped lower is an AR-10 spec before ordering.

Is this a complete build kit, or do I need other parts?

This is a lower parts kit only. You will still need a stripped AR-10 lower receiver, upper receiver, barrel, bolt carrier group, and other components to complete a rifle. This kit handles the internal lower receiver components.

Do I need gunsmithing experience to install these parts?

AR platform assembly requires familiarity with firearm mechanics and proper tools. If you're new to builds, consult a gunsmith, qualified instructor, or detailed assembly guides before attempting installation.