GEN 3 UHP-15 Billet Lower Receiver
Billet AR-15 lower receiver machined from 7075-T6 billet aluminum. Serialized — ships to your FFL.
Limit 2 per order.
Part no. CMT-UHP15-G3
What goes with this lower.
A lower needs an upper and a handguard to become a rifle. These are our uppers and one rail from each of three series: HDM, TANO and ARCA.
- CMT parts for this build
- UPUR-1 Billet Upper Receiver — Billet AR-15 upper receiver.
- UPUR-2 Billet Upper Receiver - No Forward Assist — Billet AR-15 upper receiver.
- UPUR-1LH Left Hand Eject Billet Upper Receiver — Billet AR-15 upper receiver, left-hand eject.
- HDM 10.5 Rail — 10.5 in. free-float handguard for AR-15 uppers.
- TANO 11.5 Rail — 11.5 in. free-float handguard for AR-15 uppers.
- HDM-A2 15 ARCA Rail — 15.0 in. free-float ARCA-Swiss handguard for AR-15 uppers.
- J.A.G. .625 Low-Profile Gas Block — Low-profile .625 in. journal gas block for AR-15 and AR-10 barrels.
- J.A.G. .750 Low-Profile Gas Block — Low-profile .750 in. journal gas block for AR-15 and AR-10 barrels.
The GEN 3 UHP-15 billet lower receiver is cut from 7075-T6 billet aluminum on CMT's own machines. The magazine well is machined to a flared, consistent profile that drops a mil-spec magazine cleanly, and the receiver extension threads and pin holes are held to spec so a standard lower parts kit and buffer assembly fit without lapping.
Specification
- 7075-T6 billet aluminum billet
- Type III hardcoat anodize (MIL-A-8625 Type III, Class 2), black
- Flared, broached magazine well
- Standard right-hand controls
- Accepts a standard mil-spec lower parts kit and buffer assembly
Before you build. A stripped lower needs a lower parts kit and a buffer assembly to function. Use a proper vise block; do not clamp on the magwell. Take care with the bolt catch roll pin and the detent springs — those are the two places finishes get scratched during an otherwise clean build.
Transfer and eligibility
This is a firearm receiver. Federal law requires it to ship to a licensed dealer. Enter your receiving FFL at checkout; we confirm the licence with the dealer before the package leaves. You complete the ATF Form 4473 and the dealer's background check in person. Age and eligibility rules are set by federal law and by your state — check both before you order, because a receiver that cannot lawfully be transferred to you cannot be returned for a refund of the transfer fee.
| Platform | AR-15 |
|---|---|
| Receiver type | Stripped lower receiver |
| Serialized | Yes — ships to a licensed dealer |
| Magazine well | Flared, broached, mil-spec magazines |
| Controls | Standard right-hand |
| Material | 7075-T6 billet aluminum |
| Finish | Type III hardcoat anodize (MIL-A-8625 Type III, Class 2), black |
| Fitment | Standard mil-spec lower parts kit and buffer assembly |
| Origin | Machined in Tennessee, USA |