Capacity: 25 rounds; For Ruger 10/22 rifles & carbines; One piece injection-molded housing allows complete disassembly for cleaning and maintenance; Replaceable nylon feed lip insert, with patent pending feed control spring; Housing, feed lip insert, follower & base plate are all constructed of a proprietary impact modified glass filled DuPont Zytel based polymer; Magazine & feed control springs are made from heat treated chrome silicone wire; Black Finish; Made in the U.S.A.; Limited Lifetime Warranty