I was just talked into working a weekend security gig for $25hr to sit on my butt all day, but I have to use a company provided weapon which is either a Glock 9 or 40cal. The guy I spoke with doesn't know the model number and they don't issue but a cheap leather holster. I am looking at getting a Safariland 6360 or similar from Ebay but they don't know which model Glocks they have. Will a 19 fit a 17/22 holster? I know nothing about Glock (S&W) fan here.