The holster is a Fobus HK-1. It fits many different guns, all of which are built about the same Here are the models this holster fit, per the manufacturers website.
H&K USP, compt/full size, 9&40
S&W Sigma, ve/e/g models, all calibers (this is what i had in it, sold the gun)
Taurus Millinium PT140
Ruger SR9

I am asking $20. Its like new, no box. I was going to use it but upgraded my gun, so i have no use for it now.