I've been in OSUT in Fort Benning the last month, home on Exodus, and they have us practicing what they call Army GFT, a mix of Gracie Ju-Jitsu, Muay Thai, Greco Roman and Western Boxing. The BJJ part of the game is what we have focused the most on and untill last month wrestling was my only form of ground fighting, and I have to say, BJJ is some real effective shit. It's so simple I feel like a dumbass for not taking it up sooner, but it works so well. They mostly have us practicing rolling your opponent from his mount and then into his guard, goining into side control and then into the mount. The only difference is they are teaching us lethal movies like cross collar chokes, how to break arms and the like. It's really some intense shit. They let us roll for upwards of 3-6 hours sometimes and all the DS are Level 2 GFT or highter, which I guess would be like an instructor belt or something. Good stuff.