Link to Promag S & W 645, 4506, 4566 & 4586 Series .45 ACP (10)Rd Nickel-Plated Steel Magazine. An Extended, Single-Stack 10-Rd Magazine For The Smith & Wesson 645, 4506, 4566, And 4586 Series Of Pistols In .45 ACP . Constructed From Heat-Treated And Nickel-Plated Steel, With a Follower, Lock-Plate, And ba....See Details For More Info.