The Magpul PMAG 10 GL9 GLOCK 17 was designed for flawless reliability and durability over thousands of rounds. Includes a high visibility controlledtilt follower stainless steel spring easily removable floorplate for cleaning paint pen dot matrix for mag marking ridged floorplate edges for better grip and 10 round indicator windows. Drops free loaded or unloaded. All with the same reliability you expect from an OEM magazine. Compatible with Magpul GLL Plates for competition use. The PMAG 10 GL9 is compatible with all fullsize 9mm Glock handguns as well as compact and subcompact variants with some protrusion below the grip. Utilizes the same double stack feed geometry as the standard capacity PMAG GL9 to ensure feeding and to avoid known reliability issues seen in many competitor products on the market. Note May not be compatible with other platforms designed for use with Glock magazines due to a wide range of magwell designs and tolerances.Made in USA.