AR15 WLA Master Parts Kit

The kit gathers a broad selection of American-made AR-15/M16 small parts, including pivot, takedown, and buffer retainer pins in black nitride, a range of detents and springs for the detents, selector, bolt catch, hammer, trigger, disconnect, and buffer retainer. All parts arrive in an organized, clearly labeled hard case. Check the specifications table on this page for exact quantities.

It's assembled for professional armorers and master-level DIY builders who maintain or rebuild AR-platform firearms across multiple projects. The deep parts supply helps you finish a build, restock your bench, or service an existing fleet. If you want a more focused starting point, compare the Stage 1 Builder's Essentials Kit.

The kit is built for the AR-15 / M16 platform. As with any AR parts selection, confirm the included components match your specific platform configuration and verify fitment against your receiver and existing hardware before installing.

Yes. The AR15 WLA Master Parts Kit is proudly Made in the USA, bringing together American-made AR-15 components. The pins and several detents feature a black nitride finish, while the pivot/takedown and selector detents are cadmium plated, as listed in the specifications table.

Yes. If you only need specific small parts to round out a project, browse individual components in the Uppers & Parts selection or grab spring packs such as the disconnect spring ten pack to restock your bench.

Orders ship in 2-3 business days, and free shipping is available on qualifying orders. The kit also comes with a 30-day money-back guarantee. Reach out through the contact page if you have questions about your order before it ships.