Kongsberg Protector RWS: Inside the System Defending 14,000+ US Army Vehicles

More than 14,000 Kongsberg Protector Remote Weapon Stations are in service with the US Army alone. When you see a HMMWV, MRAP, Stryker, or JLTV with a machine gun that swings and targets without the gunner exposing their body above the armour line — that is almost certainly a Protector. The system built its dominance through the US Army’s CROWS programme and never looked back.
Family Technical Comparison
| Variant | Weapon | Calibre | Weight | Platform |
|---|---|---|---|---|
| RS4 | M2HB / MAG 58 | .50 cal / 7.62 mm | ~130 kg | HMMWV, JLTV, light vehicles |
| RS6 | M2HB / Mk 19 | .50 cal / 40 mm | ~220 kg | MRAP, medium vehicles |
| RT20 | M621 | 20 mm | ~400 kg | Heavy vehicle, patrol boat |
| MCT-30 | Mk 44 Bushmaster II | 30 mm | ~800 kg | IFV, heavy APC |
Operator Nations
| Country | Variant | Vehicle | Qty (est.) | Source |
|---|---|---|---|---|
| USA | CROWS (RS4 derivative) | HMMWV, MRAP, JLTV, Stryker | 14,000+ | US Army |
| Norway | RS4, MCT-30 | K2, CV90 | Classified | Norwegian Defence |
| Sweden | MCT-30 | CV90 Mk IV | Order placed | BAE Systems / KDA |
| Australia | MCT-30 | LAND 400 AIFV | Order placed | CASG |
| Netherlands | MCT-30 | CV90 | Order placed | Dutch MoD |
Turkish Alternatives
| Turkish System | Maker | Calibre | Platform | Comparison Note |
|---|---|---|---|---|
| SARP | ASELSAN | 12.7 mm / 7.62 mm | KIRPI, COBRA | Direct RS4 competitor in light category |
| NEFER | ASELSAN | 7.62–14.5 mm | Various | Lighter spectrum |
| KORHAN | ASELSAN | 25–30 mm | Heavy APCs | MCT-30 competitor in development |
FAQ
Is CROWS the same as Protector RS4?
CROWS is the US Army programme built around the Kongsberg Protector RS4. The hardware is essentially Kongsberg RS4, adapted to US Army specifications and qualification standards.
Can Protector engage aerial targets?
The RS4 and RS6 in .50 cal configuration can be used against low and slow aerial threats, though they are not dedicated air-defence weapons. The MCT-30 with airburst ammunition has a defined counter-drone/aerial role.
Sources
- Kongsberg — Protector family product page
- US Army CROWS Programme Office
- CASG — LAND 400 Phase 3 announcement
- Jane’s Land Warfare Platforms

