The Sig Sauer Mosquito .22lr 10rd factory replacement magazine is the best choice to keep your favorite rimfire handgun up and running. Made from the highest quality materials like high density polymer magazine body with low friction polymer follower. The coil type magazine spring provides smooth, reliable feeding with all types of .22lr ammuniton. The Sig Sauer Mosquito 10rd magazine is made to the highest standards of craftsmanship and quality so you can be assured that it will work when you need it.