Just a clarification, the 5.1 mag problem that swatt13 is talking about only really affects the
WE Hi Capa 5.1. TM's have much better gas mileage, not 4-5 like the USP (which is pretty darn awesome!) but I can get about 2 1/2-3 mags per gas charge.
I love my TM Hi Capa 5.1 too.