Overwatch Precision Glock +5 G17 Magazine Extension

Built for hard use. Tuned for performance.

The Overwatch Precision +5 Magazine Extension Kit for Glock™ 17, 19X, 22, 34, 35, 45, and 47 is engineered to deliver uncompromising reliability with increased capacity where it matters most.

Precision-machined from 7075 aluminum and finished with MIL-SPEC Type III (8625) hard anodizing, this extension converts a standard 17-round 9mm magazine into a 22-round system when paired with our proprietary +10% power spring. Designed in-house, the enhanced spring ensures consistent feeding, positive slide lock-back, and dependable function—even in adverse conditions.

No shortcuts. No guesswork. Just performance.

Available in Black, Gun Metal Gray, and FDE, each extension features a machined dot matrix for fast, intuitive magazine identification—because accountability and organization matter whether you’re on the range, competing, on duty, or carrying daily.

Choose the standalone extension kit to upgrade your existing magazines, or select the complete 17-round OEM magazine assembly with extension and spring installed—ready for immediate deployment.

For Glock™ 22 owners running .40 S&W, this extension delivers a +4 capacity increase with the same proven reliability.

More capacity only matters if it works every time.

The Overwatch Precision +5 Magazine Extension Kit is built to ensure it does and pairs with our HAVE BLUE Magwell for Glock™.

What’s Included

• +5 Capacity (9mm) / +4 Capacity (.40 S&W)

• 7075 Aluminum Magazine Extension

• +10% Enhanced Power Magazine Spring

• OEM Retainer Clip

• All Required Attachment Hardware

• MIL-SPEC Type III (8625) Hard Anodized Finish

• 17-Round OEM Magazine (when complete kit is selected)

• Designed to work with or without our HAVE BLUE Magwell for Glock™ 

***Will not allow you to add rounds to legally restricted 10-round magazines*** 

***Not compatible with Ranger Proof Shoes***

DISCLAIMER: This product is not manufactured, authorized, endorsed,
or warranted by GLOCK. GLOCK does not warrant or represent that
this product is compatible with GLOCK pistols.

DISCLAIMER: “GLOCK” is a federally registered trademark of
GLOCK, Inc. and is one of many trademarks registered by GLOCK, Inc.
and GLOCK Ges.m.b.H. Neither Ben Stoeger Pro Shop nor this site are
affiliated in any manner with, or otherwise endorsed by, GLOCK, Inc. or
GLOCK Ges.m.b.H. The use of “GLOCK” on this page is merely to
advertise the sale of pistols, parts, components or accessories that are
compatible with GLOCK. For additional genuine GLOCK, Inc. and
GLOCK Ges.m.b.H. products and parts visit www.glock.com.