The M1224 MaxxPro was developed by Navistar International as a 4x4, Mine Resistant Ambush Protected armored vehicle. It is built on the International 7000 series chassis with armor designed by Plasan Sasa of Israel. It was built for the United States Marine Corps with the first two pilot vehicles ready for testing in 2007. After successful trials production orders were placed the same year by both the USMC and US Army. Several variants have appeared with different levels of protection, a weapon station is normally mounted on the roof. The M1224 weighs 13.5 tons and is powered by a MaxxForce D9 330 bhp diesel engine and Allison 3000 5-speed automatic transmission. It is capable of speeds up to 100 km/h and has a road range of 400 km. The M1224 features bolted armor panels which can quickly be replaced in the field, rather than conventional welded armor. The vehicle is primarily used for patrol in hostile territory and can withstand a mine or IED with up to 7kg of explosive. Over 9,000 MaxxPro MRAP's have been built and it is used by all branches of the US military. It has also been purchased by 20 friendly nations for military and police use. Most M1224's have been used in Iraq and Afghanistan to combat terrorist forces, replacing the more vulnerable HUMVEE and other soft skin vehicles.