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™ 

Important Notes:

DISCLAIMER: "GLOCK" is a federally registered trademark of Glock, Inc., and is one of many trademarks owned by Glock Inc. or Glock Ges.m.b.H. Neither Overwatch Tactical LLC, dba Overwatch Precision, nor this site is 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 Glock pistols, parts, or components.

 For more information, we recommend downloading the manual directly from Glock here.

WARNING: This product can expose you to chemicals including lead, which is known in the State of California to cause cancer and birth defects or other reproductive harm. For more information, go to www.P65Warningsca.gov