they are indeed pin fires in 11/mm, I also have two of them and are a lot of fun to shoot! you can get pin fire brass from BOB HAYLEY IN SEYMOUR, TEXAS. at 211 NORTH RIVER, PO BOX 889, SEYMOUR, TX. TELE- (940) 888-3352. give him a call leave a message and he will get back to you. toot.