Armscor Precision Inc RIA-MAG STK100 Pistol Magazine 9mm Luger 10 Round Black 1 Pack Steel. The magazine fits flush in the pistol frame with a unique reverse snout that allows for quick and easy loading. The magazine utilizes a push-button for fast and silent loading and ejection. The reliable spring train system ensures that there are no feedback malfunctions. The magazine also features an anti-friction surface to provide reliable feeding even with strong recoil. The Armscor SHIELD XL is designed for an ultra-slim compact pistol body with an auto-reset spring ejection shaft and wrap-around heat treated steel follower. Specifications for Armscor Precision Inc RIA-MAG STK100 9mm Luger 10 Round Pistol Magazine: Manufacturer: Armscor Precision Inc Gun Make: Armscor Gun Model: Rock Island Armory STK100 Caliber: 9mm Luger Magazine Capacity: 10 Round Color: Black Quantity: 1 Fabric/Material: Steel Gun Type: Pistol Package Contents: Armscor Precision Inc RIA-MAG STK100 9mm Luger 10 Round Pistol Magazine What firearm models does the manufacturer say Armscor Precision Inc RIA-MAG STK100 9mm Luger 10 Round Pistol Magazine is compatible with? The manufacturer suggests that Armscor Precision Inc RIA-MAG STK100 9mm Luger 10 Round Pistol Magazine is compatible with Rock Island Armory STK100Armscor Precision Inc STK10010-10RD: RIA-MAG STK100 Pistol Magazine 9mm Luger 10 Round Black 1 Pack Steel