Heckler & Koch HK69A1
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The HK69A1 is a 40 mm grenade launcher developed and produced by the German arms manufacturer Heckler & Koch. The weapon was designed to engage enemy troops and strongpoints out to a distance of 350 m; it can also be used to deploy smoke grenades... Wikipedia
Barrel length: 356 mm (14.0 in)
Effective firing range: 50 to 350 m sight adjustments
Feed system: Breech-loaded, single-shot
Manufacturer: Heckler & Koch
Muzzle velocity: 75 m/s (246 ft/s)