This factory magazine comes standard with the 23-round P211 models. Since the P211 operates off P320 magazines, this magazine will also work with ALL 9mm P320 models. This magazine features rear witness holes to confirm loaded capacity, an orange follower that makes it easy to identify when unloaded, and a black baseplate. The baseplate assembly is made of durable aluminum with a polymer sleeve. The baseplate sleeve is a one-piece assembly and is designed to be seated at the bottom of the P211 and full-size or carry P320 grip modules. There will be a gap when used on P320 compact grip modules.