Here is a gun magazine for Ruger MK II 22/45 Polymer guns. This is a 10 round 22lr Factory gun magazine. This magazine is made from heat treated steel and has a high impact strength base plate and follower. The spring is made from high tensile strength steel. Gunclip Depot has the largest selection of Ruger gun magazines and gun clips. If you do not see the gun magazine you are looking for send us an email and we will try to locate it for you. Orders shipped within 24 hours except week-ends and holidays.