Saab Bofors Dynamics CBJ-MS
| CBJ MS | |
|---|---|
 A CBJ MS with a 30-round magazine | |
| Type | Submachine gun Personal defense weapon |
| Place of origin | Sweden |
| Service history | |
| Used by | See Users |
| Production history | |
| Designer | Carl Bertil Johansson |
| Designed | Early 2000s |
| Manufacturer | CBJ Tech AB Saab Bofors Dynamics |
| Specifications (6.5×25mm CBJ chambering) | |
| Mass | 2.8 kg (6.2 lb) (empty) 3.05 kg (6.7 lb) (loaded, 30-round magazine) |
| Length | 363 mm (14.3 in) (stock retracted) 565 mm (22.2 in) (stock extended) |
| Barrel length | 200 mm (7.9 in) |
| Width | 44 mm (1.7 in) |
| Height | 189 mm (7.4 in) (with 20-round magazine) 240 mm (9.4 in) (with 30-round magazine) |
| Cartridge | 6.5×25mm CBJ 9×19mm Parabellum |
| Action | Open bolt, Select fire (Progressive Trigger), Blowback Operated. [1] |
| Rate of fire | 700 rounds/min |
| Muzzle velocity | 2,723 ft/s (830 m/s) |
| Effective firing range | 150 m (490 ft) |
| Maximum firing range | 400 m (1,300 ft) |
| Feed system | 20- or 30-round detachable box magazine 100-round detachable drum magazine |
| Sights | Adjustable open iron sights Optical sights (Picatinny rail) |
The Saab Bofors Dynamics CBJ MS is a personal defense weapon/submachine gun designed and manufactured by CBJ Tech AB; it was also manufactured by Saab Bofors Dynamics. It can be chambered for both 6.5×25mm CBJ and 9×19mm Parabellum cartridges.
Development
The CBJ MS was first shown in August 2000. It is an unusual weapon in several respects, not least because it is meant to fulfill the roles of personal defense weapon, assault rifle and, with the addition of a proprietary bipod and 100-round drum magazine, squad automatic weapon.
The gun features a top-mounted Picatinny rail for mounting optics, a progressive trigger for semi-and full automatic fire, a collapsing wire stock, a grip safety, a threaded barrel, and a hollow foregrip which can be used to hold a spare magazine.
The CBJ MS is capable of being field-converted to fire one of two types of ammunition. For the purely military role, the weapon fires the proprietary 6.5×25mm CBJ cartridge; but by simply changing the barrel, it can fire 9×19mm Parabellum ammunition for police, training and other operations. The 6.5×25mm CBJ cartridge has the same overall dimensions as the 9×19mm cartridge and generates the same level of firing impulse.
The projectile is a tungsten insert held in a plastic sabot, fired at a high muzzle velocity (815 m/s, 2,670 ft/s) with the ability to defeat current and future body armours.
It is claimed to be effective against lightly armoured vehicles such as armoured personnel carriers (APCs). Advantages claimed for the 6.5×25mm CBJ cartridge include a high impact velocity, a high hit probability due to the flat trajectory, high energy transfer to the target, and low levels of barrel wear and corrosion.
Current cartridge cases are being developed using aluminium. Each 6.5×25mm CBJ cartridge weighs 4.5 grams (0.16 oz) and has an overall length of 29.7 millimetres (1.17 in). The projectile weight is 2 grams (0.071 oz). The combat range of the cartridge is stated to be up to 400 metres (1,300 ft).[1]
