Pro Mag 1911 .22 LR Kimber / Marvel / Iver Johnson Conversion Pistol Magazine Polymer Black 14 Round 14RD. The follower is injection molded and the magazine spring formed from heat treated chrome silicon wire. Specifications for ProMag 1911 .22 LR Kimber / Marvel / Iver Johnson Conversion 14-Round Pistol Magazine: Manufacturer: ProMag Gun Make: 1911 Platform Gun Model: Kimber 1911 Caliber: .22 Long Rifle Magazine Capacity: 14 Round Color: Black Fabric/Material: Polymer Package Contents: ProMag 1911 .22 LR Kimber / Marvel / Iver Johnson Conversion 14-Round Pistol Magazine What firearm models does the manufacturer say ProMag 1911 .22 LR Kimber / Marvel / Iver Johnson Conversion 14-Round Pistol Magazine is compatible with? The manufacturer suggests that ProMag 1911 .22 LR Kimber / Marvel / Iver Johnson Conversion 14-Round Pistol Magazine is compatible with Kimber 1911Pro Mag KIM-A1-14RD: 1911 .22 LR Kimber / Marvel / Iver Johnson Conversion Pistol Magazine Polymer Black 14 Round