Russia`s defense contractor Bazalt (a subsidiary of the Rostec’s Concern Tecmash) has detailed its DP-64 45 mm counter-sabotage grenade launcher. "The DP-64 grenade launcher can be used by both naval ships and civil vessels, including during counter-piracy operations. Owing to an active scheme of functioning, the weapon features a locked breech end. The launcher produces almost no noise," said a spokesperson for Bazalt.
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DP-64 Nepryadva grenade launcher (Picture source: Turbosquid)