The newest suppressed model purchased by our military is the HK MK24, although the MK23 is an excellent choice as well. The MK24 is the HK45ct, aka the model HK45 compact tactical. The HK45 is also about half the price of the venerable MK23.
http://www.hk-usa.com/civilian_produ...ct_general.asp
photo borrowed from photobucket.