Check-Mate Industries 1911 Sub-Compact 3in .45 ACP 6 Round Pistol Magazine Black. Check-Mate's 1911 .45 ACP magazines are made from the highest quality American milled stainless and high carbon steel. Every tube is through-hardened for exceptional strength and durability. Each Tube is polished inside and out to eliminate drag and our proprietary welding techniques insure solid welds that won't break. Check-Mates high-performance springs offer high quality outstanding reliability and exceptional spring endurance. Specifications for Check-Mate Industries 1911 Sub-Compact 3in .45 ACP 6 Round Pistol Magazine: Manufacturer: Check-Mate Industries Gun Make: 1911 Platform Gun Model: 1911 Sub-Compact 3in Caliber: .45 ACP Magazine Capacity: 6 Round Fabric/Material: Steel Gun Type: Pistol Package Contents: Check-Mate Industries 1911 Sub-Compact 3in .45 ACP 6 Round Pistol Magazine What firearm models does the manufacturer say Check-Mate Industries 1911 Sub-Compact 3in .45 ACP 6 Round Pistol Magazine is compatible with? The manufacturer suggests that Check-Mate Industries 1911 Sub-Compact 3in .45 ACP 6 Round Pistol Magazine is compatible with 1911 Sub-Compact 3inCheck-Mate Industries CM4519116SCB: 1911 Sub-Compact 3in .45 ACP 6 Round Pistol Magazine Black