Pearce Grip PG1045+ Polymer Magazine Extension for Glock Gen4 20/21/29/40/41 High Capacity Mags (Adds 2 Rounds) - Black Finish

The Pearce Grip PG1045+ polymer magazine extension is a simple, effective way to add capacity to your Glock Gen4 high-capacity magazines. This extension replaces your factory floor plate and adds two rounds to compatible models, giving you a quick boost in firepower without changing your carry setup or handling characteristics. It's the kind of modest upgrade that makes a real difference in a defensive or competition context where every round counts.

Built from durable polymer in black, the PG1045+ is designed specifically for Glock's high-capacity magazine lineup—models 20, 21, 29, 40, and 41. It's engineered to work with both third and fourth generation Glock platforms. Installation is straightforward: the extension simply replaces your existing magazine floor plate. There's no gunsmithing required and no permanent modifications to your magazines.

A key detail worth noting: this extension is designed for high-capacity magazines only. It will not function on 10-round factory magazines in the M20 and M21 models. However, if you're running Glock M30 9-round magazines, the PG1045+ will reliably extend them to 11 rounds, adding real utility to a smaller platform. Reliability and fit are straightforward—Pearce Grip's polymer construction has proven track record with Glock shooters, and the extension maintains the same reliability you expect from factory Glock magazines.

Key Features

• Adds 2 rounds to compatible high-capacity Glock magazines
• Replaces factory floor plate—no gunsmithing or permanent modifications
• Works with Glock Gen3 and Gen4 platforms
• Compatible with M20, M21, M29, M40, M41, and M30 9-round magazines
• Durable black polymer construction
• Simple installation and removal

Specifications

Frequently Asked Questions

Will the PG1045+ work on my 10-round Glock M20 or M21 magazine?

No. The PG1045+ is designed for high-capacity magazines only and will not function on 10-round factory magazines in those models. It is compatible with the full-capacity versions of the M20 and M21, as well as the M29, M40, and M41 high-capacity magazines.

Can I use this extension on a Glock M30 magazine?

Yes, but only on the 9-round M30 magazines. The extension will bring them to 11-round capacity. It is not compatible with M30 10-round magazines.

Do I need a gunsmith to install this extension?

No. The PG1045+ simply replaces your factory floor plate. Installation is straightforward and requires no gunsmithing or permanent modifications to your magazines.

Will this work with both Gen3 and Gen4 Glock models?

Yes. The PG1045+ is compatible with both third and fourth generation Glock platforms for all compatible magazine models.