Our Complete AR-15 Lower Build Service service is performed by our licensed gunsmith at The Freedom Dispenser Company. We build your lower correctly, verify all function checks pass, and have it ready to mate with an upper. A single out-of-spec installation can cause malfunctions or safety issues — we do it right the first time.
What Does Complete AR-15 Lower Build Service Include?
- Install trigger group (trigger, hammer, disconnector, springs, and pins)
- Install safety selector with correct detent and spring
- Install bolt catch assembly
- Install magazine catch assembly
- Install pistol grip with correct spring orientation
- Install buffer tube, buffer, and recoil spring
- Stake castle nut to mil-spec
- Full function check (trigger pull, safety engagement, bolt catch operation)
Why Would You Need Complete AR-15 Lower Build Service?
A stripped lower receiver is just a paperweight until it’s assembled. Many AR builders complete their own lowers, but there are several steps where a wrong move can create a firearm that doesn’t function safely. Customers come in for a lower build when:
- First-time AR builder who wants the lower done professionally
- Purchased a stripped lower as part of an FFL transfer and needs it built
- Previous DIY build resulted in a safety or function issue
- Building an SBR or pistol lower and want a clean, correct build
- Upgrading lower internals and want a complete reinstall
Pricing and Booking
Price: $50 — Ready to get started? Book your appointment here.
Frequently Asked Questions
Do I need to supply the lower parts kit?
Yes. Bring your stripped lower and LPK (lower parts kit). If you need a buffer tube kit, bring that too. Ask us if you need help sourcing parts.
Does this include the stock or brace?
Buffer tube, buffer, and spring are included. Stock or pistol brace installation is part of the service at no additional charge as long as you bring the component.
Can you install an upgraded trigger as part of the build?
Yes. If you’re dropping in an aftermarket trigger, just bring it along. We’ll install it as part of the build at no additional charge.