A little more background on the two different Humvee replacement programs...
The Army a couple of years back knows it wants new trucks because it has the FMTV, M939, and M35. The truth is the maker of the FMTV is not "experienced" in making trucks (politics here). When you think of American trucks, you think of Mack, Oshkosh, Freightliner, Peterbilt, Ford...you don't think of the maker of the FMTV. Look on the highway and see the last truck the maker of the FMTV made. Go to the LHS and find a commerical truck made by the maker of the FMTV...you can't. The FMTV maker's name isn't an American household name and yet it makes trucks
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As such, the FMTV cannot replace the M939 at the rate the FMTV is being produced.
Hence the "Truck Rodeo" which will occur this year because the Army needs to replace a lot of trucks, mainly medium and heavy.
Now the USMC has their 7-ton Oshkosh MTVR, which I heard runs rings around the FMTV so the USMC doesn't really care for a new Medium Truck...but they sure want a Humvee replacement fast and maybe a heavy truck replacement.
I read that the Humvee is pissing off the Marines---they want a replacement fast....faster than the Army it seems.
So then the US Army wanted a Humvee replacement too because the M1114 isn't produced fast enough. The problem with the M1114 is that it takes a conventional Humvee off AM General, ships it down south to O'Gara Hess, strips the interior, and uparmors it, meaning the M1114 doesn't roll off the factory floor already armored, but more like stuffing feathers in a bought pillow sack and sewing it all together by hand. This takes time and money (something like $100,000 for a Humvee and $550,000 for a M1114...all hand-labor for the M1114). This isn't O'Gara's fault because they uparmor commerical civilian cars, trucks, and SUVs for VIPs, movie stars, Government Law Enforcement, and rich people....not for military. As such, O'Gara does custom-jobs, not mass production of armored cars.
The USMC wants a Humvee replacement that can seat six because experience in Iraq shows more troops are needed than say three (one being the driver. With six, that's a dismount of five), the Army wants one that can seat four. Of course the big conflict is that the Army goes by Air Force and the USMC by Navy---a Navy ship has more space than an AF plane. I think the USMC wants one that's armored with a turret (like an armored car) and a V-hull and the Army wants one that can have add-on armor attached but is still Humvee-like, meaning I think the USMC has a set list of requirements compared to the Army that just wants more armor. The USMC wants to remedy the problems it experienced in Iraq; the Army just wants a new light truck to replace the wearing-out Humvees. See, two different agendas here.
So then someone saw Army...USMC...combine the two and save money (wave wand)....done! Now the effort is "joint" and the Army and USMC are pooling their management and money together.
This makes sense for the upcoming Army "Truck Rodeo" where contenders from U.S. and overseas will come, but who knows if the USMC picks one and the Army picks another.
This also happened with the Army Special Forces picking the Pandur, the runner-up to the Piranha III which became the Stryker. By picking the Pandur stock, the Spec Forces didn't need to wait for General Dynamics to trim and shim and modify the Piranha III to make a Stryker; the Spec Forces got their 6X6 armored car NOW.