Hi pardt - I am having a heck of a time with my reply, but Thanks for trying to help me out! I have 5 shells that fit the mag, but don't know if they will load. On the base of the grip next to the mag release there is a k. When I disassembled I found the last 3 digits - 624, of the s/n in 2 places - inside the slide and on the machined part that holds the spring.