Ruger KP Series 10-Round Magazine

Ruger .40 S&W Factory Mag

This is Ruger's own 10-round magazine for its .40 Smith & Wesson P-series pistols and the PC4 carbine. It is an OEM part, meaning Ruger made it as original factory equipment, so it matches the dimensions and tolerances of the magazine your gun shipped with. It suits owners who want a spare for the range bag, a replacement for a worn magazine, or a 10-round option where local law limits capacity.

Features

• .40 S&W Chambering — Built to feed .40 Smith & Wesson cartridges and no other caliber.
• 10-Round Capacity — Holds ten rounds, which keeps it legal in states and cities that cap magazine capacity at ten.
• Broad Ruger Fit — Works in the Ruger P91, P944, KP91, KP944 pistols and the PC4 carbine.
• Steel Body — The tube is formed from steel, which holds its shape against drops and repeated loading better than polymer.
• Blued Finish — Bluing is a chemical treatment that darkens the steel and gives it some resistance to rust, so a light coat of oil helps keep it that way.
• Witness Holes — A row of small holes down the back of the body lets you see the cartridges inside and judge how full the magazine is.
• Flared Base Plate — The extended floor plate gives your fingers something to grip when stripping out a stuck magazine and guides your hand on reloads.
• Made In The USA — Manufactured by Ruger in the United States under part number 90089.

Fit And Construction

Because it comes from Ruger, this magazine drops into the listed pistols and the PC4 without fitting or modification, and the catch notch on the side lines up with the factory magazine release. It weighs about 0.5 lb (227 g) empty. Check your model before ordering: it is made for the .40 S&W guns named above and will not work in 9mm or .45 ACP P-series frames.