OEM Style Glock Magazine release printed in house on SLS printers in nylon 12. Perfect for DD series, Glock mag SD9, Mac Daddy frames and anything else that uses a Glock mag release. Compatible with Glock 9mm, .40S&W, .357Sig, or .45GAP. frames. Does not fit Gen4 or Gen5, 21SF, Slim frame 43, 43x or 48.