Well I don't have any old Glock's but I'm working on buying one of each. I currently have 7 (G21, G17, G32, G34, G19, G26, G22). Not sure which is next, looking at the 36, 27, or 23. I'm signed up for the Glock armor course in July and looking forward to it. Wish I could find the Glock 380's. Maybe I'll get lucky one day.