The AHS Krab (Polish for Crab) is a 155 mm NATO-compatible self-propelled tracked howitzer (or more precisely a gun-howitzer) designed in Poland by Centrum Produkcji Wojskowej Huta Stalowa Wola combining K9 Thunder chassis, a AS-90M Braveheart turret with 52-calibre gun and WB Electronics "Topaz" artillery fire control system. The 2011 version used a Nexter Systems barrel and UPG chassis. The future production batch expected in 2016, utilize K9 chassis and Rheinmetall barrel.