Check the magazine frequently. The magazine follower must move freely and have adequate tension so that each cartridge is quickly raised to the feeding position. The magazine lips should be clean and free of cracks, dents, or nicks, so that cartridges are held in their proper feeding position.
If the magazine becomes dirty, it should be disassembled and thoroughly cleaned. You could encounter two types of Ruger magazines, with either a pinned base or a snap-on base. The following disassembly instructions apply:
Pinned Base (used on 10 round 9mm magazines) - Use a punch to remove the roll pin that extends through the side of the magazine body. Once the roll pin has been removed, pull the magazine base from the bottom of the magazine body, taking care to prevent the forcible ejection of the compressed magazine spring. Withdraw the magazine spring from the magazine body. Turn the magazine upside down and remove the follower.
Snap-On Base - Use a punch to press in on the magazine spring seat where it protrudes into the hole in the magazine floorplate. Slide the magazine floorplate toward the front of the magazine, taking care to prevent the forcible ejection of the magazine spring seat and compressed magazine spring. Withdraw the magazine spring seat and magazine spring from the magazine body. Turn magazine upside down and remove magazine follower. Reassemble in reverse order.
When cleaning is necessary, use a solvent that will not rust the metal components or adversely affect the magazine body. After the magazine has been soaked to loosen foreign matter, be certain to shake it vigorously (with the loading opening away from you) to remove solvent or residue from within the magazine. Penetrating oils and solvents inside a magazine can "kill" or weaken cartridge primers which can result in failures to fire or other possibly dangerous malfunctions, such as leaving a bullet in the bore!
After cleaning always check to be certain that the magazine follower movement and tension are correct, and that no solvent or debris remain. Improper reassembly of the magazine spring can cause a potentially dangerous malfunction. If cleaning does not restore proper tension, or if you experience a problem with the magazine, don't use it. Get a new one.
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