CNC Guns 4 inch rail for KeyMod systems allows installation of additional equipment on the handguards equipped with a standard KeyMod interface.
| Jaeger | ₽1,060 |
| Flea Market | ₽6,500 |
| Flea Market | ₽6,000 |
| Jaeger | ₽605 |
| Mechanic | ₽565 |
| Prapor | ₽504 |
| Ref | ₽504 |
| Skier | ₽494 |
| Fence | ₽302 |
| Peacekeeper | $4 |