The PM160 magazine extension adds two (2) 3'' magnum shells, or three (3) 2-3/4'' shells in capacity to 12-gauge Winchester 1300 shotguns. The magazine extension is machined from solid billet T6 aluminum alloy, then type III hard anodized. The extension is secured by a machined steel adapter nut that replaces the factory magazine cap. The spring is precision wound using Chrome-silicon wire, for reliability and long life. All steel components are black phosphated. Magazine extension tube clamp included, along with all mounting hardware. No permanent modification required.
Manufacturer : ProMag Model: PM160
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