Custom-engineered magazine extension for SIG P365 12-round magazines. Features precision-designed spring for reliable feeding and last-round bolt hold open.
Fits: SIG P365
This purpose-built magazine extension is engineered specifically for SIG P365 12-round magazines on standard P365 frames. It represents a thoughtful approach to maximizing the capability of one of the market's most popular compact pistols.
This extension is compatible exclusively with SIG P365 12-round factory magazines and standard P365 frames. It will not function with other magazine types or frame variants.
A quality magazine extension must balance capacity gains with absolute reliability. This extension's custom spring ensures that every round feeds cleanly and that the bolt locks back when the magazine runs dry—critical features for both training and defensive use.