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Stripped Lowers

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Choosing the right stripped lowers

At Western Sport, we carry stripped lowers options that cover the range of applications our customers actually use — range training, home defense, duty use, and competition. Our staff can help you narrow down the options based on what you are actually trying to accomplish.

We do not carry everything — we carry what works. If you ask us why we stock one product over another, we can give you a real answer. If something we carry has a known issue or a better alternative, we will tell you.

Order stripped lowers online at Western Sport and we ship to the licensed FFL dealer you choose near you. A lower receiver is the serialized part, so it transfers like any firearm: you fill out the 4473 there and take it home. We have been a licensed FFL/SOT dealer since 2007. Questions? Send us a message before you order.

A stripped lower receiver is the bare, serialized lower of an AR-pattern rifle or pistol, with no trigger group, buffer tube or stock installed. Builders start with one when they want to choose every part themselves. Western Sport’s stripped lowers include the Rankin Industries AR-15 Billet Duty stripped lower, the Sharps Bros. Gen 2 Warthog (SBLR02) and SBLR07 billet lowers in .223 Remington/5.56 NATO, and a billet AR9 lower for 9mm builds.

Matched sets and complete lowers

If you want the upper and lower to fit tight and match, the Rankin Industries Billet Duty upper and lower matched set is a pair machined from 6061-T6 billet aluminum. Rather skip the lower parts kit? Browse complete lowers. For AR-10 and .308 builds, see 7.62 and .308 stripped lowers, or all serialized lower receivers.

How buying a stripped lower works

The lower is the part federal law treats as the firearm, so it carries a serial number and transfers like a gun: it goes to a licensed dealer (FFL), where you fill out a Form 4473 and pass a background check before you take it home.

Common questions

Is a stripped lower a firearm?

Yes. Under federal law the lower receiver is the serialized, regulated part of an AR-15, so it is sold and transferred like a complete firearm.

What else do I need to finish a stripped lower?

A lower parts kit (trigger group, safety, magazine catch, bolt catch, pins and springs), a buffer tube with buffer and spring, and a stock. An upper receiver then completes the gun.

Billet or forged lower?

Forged lowers are the mil-spec standard and the most common. Billet lowers are machined from a solid block, which allows sharper styling, and they are often sold as matched sets with a billet upper.