SIG SAUER P211/P320 9mm Luger 23 Round Extended Pistol Magazine Black 23. 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. Specifications for SIG SAUER P211/P320 9mm Luger 23 Round Extended Pistol Magazine: Manufacturer: SIG SAUER Gun Make: SIG Sauer Gun Model: SIG Sauer P320 Caliber: 9mm Luger Magazine Capacity: 23 Round Color: Black Fabric/Material: Aluminum Features of SIG SAUER P211/P320 9mm Luger 23 Round Extended Pistol Magazine USPSA compliant Durable aluminum baseplate 21 round rear witness holes Compatible with P320 9mm models in the following sizes: XFIVE XFULL XCARRY FULL CARRY. Also compatible with P211 models with the factory magwell installed. Package Contents: SIG SAUER P211/P320 9mm Luger 23 Round Extended Pistol Magazine What firearm models does the manufacturer say SIG SAUER P211/P320 9mm Luger 23 Round Extended Pistol Magazine is compatible with? The manufacturer says that SIG SAUER P211/P320 9mm Luger 23 Round Extended Pistol Magazine is compatible with SIG Sauer P320SIG SAUER 8901964: P211/P320 9mm Luger 23 Round Extended Pistol Magazine Black 23