the tank commander an independent thermal sight and ability to, in rapid sequence, shoot at two targets without the need to acquire each one sequentially, also second generation depleted uranium armor components. M1A2 SEP (System Enhancement Package): Is fitted with new, second-generation gunner's thermal sight. Has upgraded third-generation depleted uranium armor components with graphite coating (240 new built, 300 M1A2s upgraded to M1A2 SEP for the US, also unknown numbers of upgraded basic M1s and M1IPs, also 400 oldest M1A1s upgraded to M1A2 SEP). M1A2S (Saudi Package): Saudi Arabian variant upgrade of the M1A2 based on M1A2 SEP, with some features, such as depleted uranium armor, believed to be missing and replaced by special armor. (442 M1A2s upgraded to M1A2S). M1A2 SEPv2: Added Common Remotely Operated Weapon Station as standard, color displays, improved interfaces, a new operating system, improved front and side armor with ERA (TUSK kit), tank-infantry phone as standard, and an upgraded transmission for better durability. M1A2 SEPv3 (formerly M1A2C): Has increased power generation and distribution, better communications and networking, new Vehicle Health Management System (VHMS) and Line Replaceable Modules (LRMs) for improved maintenance, an Ammunition DataLink (ADL) to use airburst rounds, improved counter-IED armor package, improved FLIR using long- and mid-wave infrared, a low-profile CROWS RWS, Next Generation Armor Package (NGAP), and an Auxiliary Power Unit (APU) under armor to run electronics while stationary instead of the engine, visually distinguishing the version by a small exhaust at the left rear. More passive ballistic protection added to the turret faces, along with new Explosive Reactive Armor mountings (Abrams Reactive Armor Tile (ARAT)) and Trophy Active Protection systems added to the turret sides. Prototypes began testing in 2015, and the first were delivered in October 2017. The first unit received them in July 2020. M1A2T: Special configuration variant of the M1A2 SEPv3 reportedly being offered for sale to Taiwan as of March 2019 and approved by US State Department as of July 2019. Per DSCA statement, it is roughly equivalent to M1A2 SEPv3, except depleted uranium armor is replaced by FMS export armor. There is no mention of the Trophy APS system. The new-built tanks will be produced at Anniston Army Depot, Anniston, Alabama, and the Joint Systems Manufacturing Center, Lima, Ohio. M1A2 SEPv4 (formerly M1A2D): The US Army Thunderhorse 2-12 Calvary Regiment has received the first M1A2 SEPv4 tank . It was previously under development . The Commander's