Did HK ever make an extended mag for the USP 45? I know others have designed an extended mag with the military in mind like SIG, Beretta and Glock anthough the latter was designed with a machine pistol in mind. Im just curious, but it would be neet to have a FACTORY extended mag for the USP. Not that it is needed mind you, 13 ACPs are alot, but I would find it hard to believe a pistol designed for military/LE community wouldnt have some sort of extra hi-capacity mag available. Anyone?