[Suhiir]

Since the M1A2 SEP isn't actually in use by the USMC (they use an M1A1 FEP) it was probably added to the OOB as an afterthought so I'd be very leery of using the values in OOB #13 (USMC) over those in OOB #12 (US Army).

"The US Marine Corps awarded Raytheon a $32.5 million contract, with a total estimated value of $65 million with all options exercised, for the M1A1 tank Firepower Enhancement Program (FEP) on February 2, 2005. The contract included sensor kits and spares to be delivered to the US Marine Corps by July 2007. The FEP enhanced M1A1 Abrams were expected to reach IOC by 2006. Eventually, the entire USMC's M1A1 fleet (400+) could receive the FEP upgrade before October 2009. FEP focuses on improving accuracy at 24/7 all-weather conditions and the tank's engagement capability at extended ranges. Basically, FEP consists of Far Target Location (FTL) sensor and a second generation thermal sight which is an upgrade to the current M1A1 sight system. FTL sensor will enable USMC M1A1s to effectively warfighting beyond 2018. The same sensor was envisaged to be integrated into USMC LAV-25s."