The SPG-9 Kopyo (Russian: СПГ-9 Копьё, transliterated Russian: Stankovyi Protivotankovyi Granatomet "Kopyo" - Easel Antitank Grenade Launcher "Spear") is a tripod-mounted man-portable, 73 millimetre calibre recoilless gun developed by the Soviet Union. It fires fin-stabilised, rocket-assisted high explosive (HE) and high-explosive anti-tank (HEAT) shaped charge projectiles similar to those fired by the 73 mm 2A28 Grom low pressure gun of the BMP-1 armored vehicle. It was accepted into service in 1962, replacing the B-10 recoilless rifle.