9mm

Just put a mag extension and magwell on it Edit: have not shot it with the mag extension yet...

Dry fired my pf940c and heard a "ping" on the tile floor. Took the slide off the frame to look and along with the piece I located on the floor my firing pin broke! I should've known better buying from eBay but I gave it a chance. Like $200 for a complete slide. I was trying to finish this...