Promag Sig P226 40sw/357sig 20rd Bl

The ProMag Sig P226 40sw/357sig 20rd magazine is a purpose-built aftermarket magazine designed for the SIG Sauer P226 platform in both .40 S&W and .357 SIG calibers. Built entirely in the USA and backed by ProMag's lifetime guarantee against manufacturer defects, this 20-round magazine combines proven construction with the precision engineering that operators and competitive shooters depend on when they need reliable ammunition feeding under demanding conditions.

At the heart of this magazine is a heat-treated chrome silicon wire spring—precision wound and tested through multiple assembly checkpoints to ensure consistent performance across the magazine's lifespan. The steel construction provides the durability required for range training, duty use, and tactical applications where magazine integrity directly impacts reliability. The 20-round capacity maximizes loadout potential while remaining compatible with standard P226 holster carry solutions. Each component undergoes rigorous quality verification during manufacturing to eliminate inconsistencies that can compromise feeding in critical situations.

This magazine is ideal for SIG P226 owners who train regularly or who carry the platform for duty purposes. Whether running low-light qualification courses, speed drills at the range, or maintaining readiness for personal protection, operators appreciate the round count advantage that a 20-round P226 magazine provides. The Sig P226 40sw/357sig magazine serves as both a primary carry magazine and a dedicated training magazine, making it a practical addition to any P226 setup.

ProMag magazines occupy a proven place in the tactical supply market as domestically manufactured alternatives that deliver on reliability without premium pricing. The combination of USA manufacturing, heat-treated springs, and lifetime coverage makes this P226 magazine a cost-effective way to build out spare magazine capacity for any operator's rotation.