in 40×46 mm grenades, but they are not interchangeable. 40×47 mm (Romania) 40×47 mm is a cartridge caliber produced in Romania for their AG-40 model 77 and model 80 (today AG-40P) rifle-mounted grenade launchers. It features a casing with a high–low system. The propellant has low pressure and gives the projectile an average velocity of depending on the ammunition type. Production was originally handled by the arms factory Uzina Mecanica Filiasi, however production was later moved to the arms factory Uzina Mecanica Tohan Zărnești, today more commonly known as S. Tohan S.A., a subsidiary of ROMARM. Several types of the Romanian 40×47 mm exist: High explosive High-explosive fragmentation Smoke Incendiary Tear gas Practice, featuring a small flash charge and smoke signal. Inert Tohan currently (2021) offers a 40×47 mm high explosive type called GETZ (Grenadă Explozivă Tohan Zărnești) and an inert version called GITZ (Grenadă Inertă Tohan Zărnești). Both cartridges are long, with GETZ weighing and GITZ . 40×74.5 mm (Romania) 40×74.5 mm is a cartridge caliber produced in Romania for their AGA-40 Model 85 automatic grenade launcher. It features a casing with a high–low system. The propellant has high pressure and gives the projectile an average velocity of depending on the ammunition type. Production is handled by the arms factory Uzina Mecanica Plopeni, a subsidiary of ROMARM. Three ammunition types are known: A high-explosive grenade producing 150 fragments weighing each, creating a deadly radius of upon impact. A high-explosive dual-purpose grenade capable of penetrating of steel armor. An inert cartridge for loading exercise. Caseless ammunition 40 mm VOG-25 (Russia) 40 mm VOG-25 (Russian Cyrillic: ВОГ-25) (GRAU-Index: 7P17 (Russian Cyrillic: 7П17)) is a unique type of 40 mm grenade designed in the Soviet Union for hand-held grenade launchers, such as the Soviet GP-25 Kostyor and GP-30 Obuvka. Instead of a casing, the VOG-25 is caseless ammunition, featuring its propellant in an expansion chamber at the base of the projectile, functioning more like a mortar round than conventional cased ammunition. Today it is used primarily by the Russian Armed Forces in weapons such as the GP-34, BG-15 Mukha and RG-6. Several types exist but the most common version is the default VOG-25 high-explosive version. The VOG-25 is long, weighs , and features a explosive charge. It has a muzzle velocity of and will self-destruct after 14 seconds. 40 mm Metal Storm (Australia) During its time (1994–2012), Metal Storm Limited in Australia