MAGAZINE SOLD SEPARATELY. These patent pending covers are an absolute necessity for keeping your expensive action, chamber, and magazines protected! Prevent grit and debris from being transferred to your action and chamber from shooting bags, pockets, backpacks, and accidental drops. Keep your firearm feeding properly and shooting accurately by shielding it from damage and grit. MX covers install quickly and securely with a distinct, audible CLICK. Once the MX cover is installed, the magazine cannot be inserted into firearms, creating an added safety measure. Removal of a MX cover is even quicker and can easily be done with the proper technique