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If you're finishing out a billet AR-15 lower, generic parts kits built for forged receivers won't line up right. This is the kit Wilson Combat pulls from on their own custom billet rifle builds, so every piece is spec'd for a billet lower and machined to the tolerances the brand is known for.
The standout detail here is the bolt catch setup. Instead of a standard roll pin, this kit uses a threaded bolt catch screw made specifically for billet receivers, which is how the higher-end billet lowers are designed to mount that part. You also get Wilson's Bullet Proof checkered bolt release, a component that's beefier and more positive under the thumb than a plain mil-spec catch. The rest of the hardware covers the tedious small stuff builders always seem to be short on: detents, springs, the pivot and takedown pins, magazine catch assembly, safety detent, and the safety selector itself.
Think of this as the connective tissue of the lower. It gets your magazine catch functioning, your pivot and takedown pins seated, your bolt release working, and your safety selector installed. The parts are sourced to meet or exceed military specifications, which is why they run reliably and hold up over years of shooting rather than wearing loose after a season.
One thing worth knowing before you order: this is a small parts kit, not a complete lower parts kit. There's no fire control group inside, so no hammer, trigger, disconnector, or their springs. That's actually the point for a lot of builders who are already dropping in a match trigger and don't want to pay for parts they'll toss. Pair this with the lower of your choice and the trigger you want, and you've got a clean path to a finished billet lower without a drawer full of leftover mil-spec bits.
No. This is a small parts kit, so there's no fire control group inside, meaning no hammer, trigger, disconnector, or their springs. It does include the trigger and hammer pins so you can drop in the fire control group of your choice. A lot of builders prefer this because they're already installing an aftermarket or match trigger.
This kit is built specifically for billet lowers. The biggest difference is the bolt catch, which uses a threaded screw for billet receivers rather than the roll pin a forged lower needs. If you're building on a forged mil-spec receiver, Wilson makes a separate version with the trigger guard and roll pin setup that platform requires.
Most billet AR-15 lowers come with an integral trigger guard machined right into the receiver, so a separate trigger guard and roll pin aren't needed. That's why this billet-specific kit leaves them out while the forged version includes them. Check your particular lower, but the vast majority of billet receivers are set up this way.
Yes. Wilson pulls from this same set of small parts when assembling their custom billet AR-15 rifles in-house. The components are sourced to meet or exceed military specifications, so you're getting the same quality hardware that goes into their complete builds.
| UPC | 810025505424 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | TRLOWERKB15 |
| Caliber/Gauge | Universal |
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