This is the MTX 365 +3 round magazine extension for the Sig Sauer P365 12-round magazine. 

Bump your 12-round magazine up to 15 rounds with this easy-to-install magazine extension from MTX. 

The additional length added to the grip allows you to realize improved control without the need to jump up to the larger frame size. So, you get more control and more rounds, all with the reliability you’d expect from your factory magazine. 

It comes with a custom-engineered spring and an easy-loading follower, so you can rest easy knowing it’s set up for success. 

A few extra rounds can benefit any scenario for which you intend to use your P365, so don’t sell yourself short by sticking with the factory capacity! 

Note—These work with the factory 12-round magazines only. They are not for use with the 10 and 15-round magazines or the following frames: P365X, P365XL, or P365 Macro.

Why settle for 12 rounds when you can have 15? Throw a couple of these magazine extensions in your cart and upgrade those factory mags!