Lower Parts

AR-15 lower parts kits make up the second half of a complete AR-15 kit, with both of our rifle and pistol lower build kits connecting to upper parts to assemble nearly fully-functional firearms. We offer trigger groups, boat catchers, magazine releases, buffer tubes, and all the other components necessary for your build. Build your perfect firearm, here at Durkin Tactical.

Showing 1–12 of 193 results

Guaranteed Compatible AR-15 Lower Parts Kits

At Durkin Tactical, we curate individual pieces and make sure that both our rifle and pistol lower build kits are compatible with all MIL-SPEC parts they’re designed for. And with a wide range of build kits, that says a lot about our attention to detail and the quality we offer.

Best Combo For The Price

Durkin Tactical is all about giving you the best bang for your buck when you customize your next addition to your arsenal. That means quality service you can rely on. Whether you need to maintain, customize, adjust, or replace parts, we make sure our customers have access to the best selections of a variety of lower parts at a great price.

Frequently Asked Questions

What parts do I need for an AR lower?

Our AR-15 lower parts and stock kits include a complete list of included parts in the description. If you’re not sure what you need, please contact us and we can help you.

Can any AR-15 upper go on any AR lower?

Yes, the vast majority of AR-15 parts are compatible with each other. We strive to make sure our products have the highest level of compatibility possible and are all MIL-SPEC.

Can I order AR-15 lower parts online?

You can get everything you need for your AR-15 lower assembly — all parts, kits, and accessories — here at Durkin Tactical.