Armscor Precision Inc RIA MAG Rock Island Armory 1911A1 FS/MS 10mm Auto 8 Round Pistol Magazine Blued 1 Pack 8RD. This magazine is for Full and Mid sized 1911 models chambered in 10mm and holds 8 rounds of ammunition. It is made of steel and is made to Armscor/Rock Island Armory specifications and tolerances using the same manufacturing and materials as the original equipment magazines ensuring perfect fit and operation. Specifications for Armscor Precision Inc RIA MAG Rock Island Armory 1911A1 FS/MS 10mm Auto 8 Round Pistol Magazine: Manufacturer: Armscor Precision Inc Gun Make: Rock Island Armory Gun Model: Rock Island Armory 1911A1 MS Rock Island Armory 1911A1 FS Caliber: 10mm Auto Magazine Capacity: 8 Round Color: Black Finish: Blued Quantity: 1 Fabric/Material: Metal Features of Armscor Precision Inc RIA MAG Rock Island Armory 1911A1 FS/MS 10mm Auto 8 Round Pistol Magazine Steel magazine body Polymer base plate Fits RIA Full and Mid Sized 1911's chambered in 10mm and 1911 like clones. Package Contents: Armscor Precision Inc RIA MAG Rock Island Armory 1911A1 FS/MS 10mm Auto 8 Round Pistol Magazine What firearm models does the manufacturer say Armscor Precision Inc RIA MAG Rock Island Armory 1911A1 FS/MS 10mm Auto 8 Round Pistol Magazine is compatible with? The manufacturer says that Armscor Precision Inc RIA MAG Rock Island Armory 1911A1 FS/MS 10mm Auto 8 Round Pistol Magazine is compatible with Rock Island Armory 1911A1 FS Rock Island Armory 1911A1 MSArmscor Precision Inc 10-777-8RD: RIA MAG Rock Island Armory 1911A1 FS/MS 10mm Auto 8 Round Pistol Magazine Blued 1 Pack