The Pearce Grip Extension (part no. PG-R12) replaces the magazine base plate on a SIG P365’s 12-round magazine, adding about a quarter inch of gripping surface to keep your hand firm and consistently placed on the longer mag. Pearce Grips designs it specifically for the 12-round P365 magazine, not the flush-fit standard-capacity mag, so it matches the extra length that magazine already carries. Capacity stays exactly the same; the extension only improves the ergonomics of how the magazine sits in your hand.

Key Specifications

• Purpose-built for the SIG P365 12-round magazine.
• Replaces the magazine base plate.
• Adds approximately 1/4 inch of additional gripping surface.
• Improves overall grip ergonomics on the longer magazine.
• Does not alter magazine capacity.

Frequently Asked Questions

What magazine does this extension fit? The SIG P365’s 12-round magazine specifically.

Does it change magazine capacity? No, capacity stays exactly the same.

Buy the Pearce Grip Extension for SIG P365 12-Round Magazine

A 12-round P365 mag already extends past the grip, and this Pearce extension keeps your hand firm and consistently placed on that extra length instead of fighting it. Order it from our Lubbock, Texas gun shop and it ships fast to your door, along with more pistol grips and accessories.