UPUR-4 Slick Side Billet Upper - With Dust Cover Port
Billet AR-15 upper receiver. No forward assist, ejection port cover. Not serialized — ships direct to you.
Limit 5 per order.
Part no. CMT-UPUR-4
The UPUR-4 slick-side billet upper receiver is machined from 7075-T6 billet aluminum and finished in black Type III hardcoat. The barrel extension bore and the receiver face are cut in the same setup, so the barrel seats square and the extension indexes without the witness-mark guesswork that comes with a receiver machined in two operations.
Configuration
- No forward assist — cleaner right side, one less part to install
- Ejection port cover pin bosses machined
- Standard right-hand eject
- Flat-top MIL-STD-1913 rail, T-marked
- Accepts any free-float handguard that uses a standard barrel-nut thread
What is not included
This is a stripped upper receiver. Barrel, bolt carrier group, charging handle, forward assist and ejection port parts are sold separately. It is not a firearm and does not require a transfer.
Installation. Support the receiver in a vise block designed for uppers. Torque the barrel nut to the handguard manufacturer's value and confirm gas-tube alignment before firing.
| Platform | AR-15 |
|---|---|
| Receiver type | Stripped upper receiver |
| Serialized | No — ships direct to you |
| Top rail | Flat-top MIL-STD-1913, T-marked |
| Forward assist | No |
| Ejection port cover | Provision machined |
| Ejection | Right-hand |
| Charging | Rear |
| Material | 7075-T6 billet aluminum |
| Finish | Type III hardcoat anodize (MIL-A-8625 Type III, Class 2), black |
| Origin | Machined in Tennessee, USA |