Description
The ProMag SIG18 is a factory-spec replacement magazine built for the Sig Sauer P290 subcompact pistol. Chambered in 9mm Luger and holding 6 rounds, this single-stack detachable mag drops right into your P290 for everyday carry, range sessions, or as a spare to keep your pistol topped off.
The magazine body is constructed of heat-treated steel finished with a black oxide (blued) coating for corrosion resistance and long service life. An injection-molded polymer follower feeds rounds smoothly, and a chrome silicone wire spring maintains consistent tension shot after shot. ProMag’s Standard series matches factory dimensions so the mag seats and locks in without any fitting required.
Built as a reliable, Made in the USA aftermarket option, the SIG18 is a solid primary carry replacement or range backup for your Sig Sauer P290.
