Warne Sig P320 Magazine Extension +5 9mm FDE

Description

Adding five extra rounds to your P320 magazines doesn't have to mean buying entirely new mags. The Warne extension replaces your factory baseplate and keeps things simple, transforming your standard 17-round factory magazine into a capable 22-round platform without adding bulk or changing how the gun handles.

Build Quality and Durability

Warne mills these extensions from 6061-T6 aluminum billet and finishes them with hardcoat anodize in Flat Dark Earth. That hardcoat finish resists scratches and corrosion from regular handling and range use. The retention is handled by a Torx head screw with washer, which stays put without being overly complicated to install or remove when you need to service the magazine.

Smart Design for Practicality

The ergonomic profile isn't just marketing talk here. Finger grooves cut into the extension give you something solid to grab during reloads, and they help you strip magazines from the gun if one gets stuck in the magwell. The extension tapers naturally into the magazine tube, so it doesn't create an awkward bulge in your hand or mag carrier. It works with 17-round P320 factory magazines.

Installation and Function

Swapping out the baseplate takes a few minutes with basic tools. The extension comes with a replacement spring sized for the extra capacity, so feeding stays reliable when you're running it hot at the range or in competition. Once installed, the magazine functions exactly like factory, just with more rounds available between reloads.