Ruger Mini 14 Magazine All Ram-Line Magazines have a unique patented design with special features such as: Constant force, 1lb spring, easy loading-no thumbusting, reliable feeding, coil spring doesn't take a set-keeps its memory,load and store magazines indefinitely, tough molded baseplate & follower, patented side by side feeling expands capacity with no increase in size and see thru smoke color for easy round count. Also fits Ruger 77/22 & 96/22 Ram-Line Combo Magazine fits and functions in both Ruger Mini-14 and AR-15 .223 cal, pre-ban 30 Round with body, floorplate and follower constructed of a tough aerospace polymer.