MAG SIG P226 357/40 12RD BL

Description

The Sig Sauer MAG-226-43-12 is the factory original magazine for the P226 in .357 SIG and .40 S&W, built for shooters who depend on the platform for duty carry or serious range work and want to keep replacement or spare magazines at OEM spec. Because both .357 SIG and .40 S&W share the same case head diameter, a single magazine body handles either chambering, which matters if you run P226s in both calibers or plan to convert between them — no guessing about fitment or feeding geometry when you swap.

The body is steel with a blued finish, which keeps the magazine’s internal dimensions stable under the heat and friction of high round counts in a way that lighter materials can flex under sustained use. The phosphate-over-steel construction also offers a degree of corrosion resistance for magazines that live in a duty holster or range bag rather than a safe. A double-stack arrangement fits 12 rounds while keeping the baseplate flush with the grip, so the magazine doesn’t extend the profile of the pistol. The polymer baseplate strips off for cleaning, letting you fully inspect the interior and follower after a session rather than trying to clear debris through the feed lips. The polymer follower maintains the correct feeding angle from the first round to the last, which is where a number of aftermarket units begin to show inconsistency. Being a factory Sig Sauer component, dimensional fit to P226 magazine wells is as intended from the factory, with no break-in period or adjustment needed.