The .40 and 9mm USG's have been out since late last year. The date of test firing on mine I believe is Oct. of 07. It took me up until about two weeks ago to track one down. I have heard that the 45 USG's wont be released until summer. Given that the 45 has been a hit, the USG versions might get circulated a little faster and more widespread than the 9 and .40 USG's did.