BS-1 30 mm silenced grenade launcher
The BS-1 30 mm silenced grenade launcher has appeared under the designation RGA-86 in Russian literature, but it appears that BS-1 is more widely accepted in Russia. Regardless of designation, the Russians have developed an innovative silenced grenade launcher for use by special operations forces.
The BS-1 is always seen mounted on a suppressed version of the 5.45 mm AKS-74U short assault rifle differentiated from the standard AKS-74U by a leather flap that fits on the forestock of the weapon and covers the BS-1 mount when the launcher is not installed; the designation AKS-74UB has been used for this rifle. A silenced grenade launcher is of great utility in a close combat situation as it not only reduces sound, but also reduces flash and smoke.
BS-1 launch cartridges are magazine fed using a bolt action and utilise a special star crimped cartridge. The grenade is muzzle loaded, as with other RFAS underbarrel grenade launchers, but there the similarity ends. Although there has been no explanatory literature as to the functioning of the BS-1, certain aspects of its operation can be deduced. The BS-1 launcher has a large containment chamber behind the barrel with a piston that launches the VOG-T HEAT grenade. The expanding gases of the launch cartridge propel the piston rapidly forward, pushing the grenade from the launcher muzzle. The piston obturates against a shoulder inside the containment chamber and, after the grenade is launched, the gases bleed off quickly enough to allow for a relatively rapid follow-up shot.
Calibre: 30 mm
Operation: manual, muzzle loaded; launch cartridges fed from detachable box magazine
Weight: ca 1.5 kg
Length: ca 320 m
Effective range: ca 100 m
Armour penetration: ca 125 mm RHA
Manufacturer: Russian state factories.
Status: In production.
Text Information from Janes Infantry Weapons
Picture courtesy of: PIERANGELO TENDAS