Upper Receivers
Lewis Machine & Tool Upper Receivers
The MLC monolithic upper puts receiver and rail in one piece of aluminium, so the optic and the barrel never move relative to each other.
Current upper receivers
| Model | Type | Construction | Notable features |
|---|---|---|---|
| MLC Monolithic Upper | Monolithic | Forged 7075-T6 | Receiver and rail in one piece |
| MRP Upper | Monolithic, quick-change | Forged 7075-T6 | Barrel changes without tools |
Line-up checked against the manufacturer's catalogue. Checked 2026-08-01