Overview
Whether you're competing and need the advantage of additional capacity or you just want a few extra rounds in your spare carry mag, baseplates are a great way to extend your standard capacity magazines. The Henning Group Mag Extension comes with an extended spring to ensure reliability and extend Glock 17 mags to a maximum of 23 rounds, though we recommend loading them to 22 for consistency. When paired with an OEM Glock 17 Magazine, these mag extensions are USPSA Legal for Carry Optics, Limited Optics, Limited, and Open.
What's Included
- 1x Henning Mag Extension
- 1x Extended Magazine Spring
Specs
FEATURES
- USPSA Legal for Carry Optics, Limited Optics, Limited, and Open
- Takes 9mm Glock 17/34 magazines from 17 rounds to 23 rounds (22 recommended) with extended spring
- Takes 9mm Glock 31 round and 33 round magazines to 37 rounds with factory spring
- Warranty: Covered by Henning Group's manufacturer warranty. Warranty service is provided by Henning Group.
Made in USA.
Installation Video - Henning Group
For consistent reloads, we highly recommend down-loading from 23 to 22 rounds, especially for EDC use.
In a competition setting, you can load one mag all the way up to stage your gun, leaving you with a full 22+1 capacity.
Technical Specifications
| Total Length (G17 Mags) | 141.25mm (5.56 in) |
30 Day Return Policy
Return or exchange anytime within 30 days of receipt. Available for domestic orders only. Item must be in new condition and in the unopened original manufacturer packaging. Customer pays return shipping.
Learn more →Shipping Restrictions
- Cannot be shipped to: CA, CT, DC, MA, MD, NJ, NY, WA.
- Cannot be shipped to: CO, VT.
- Cannot be shipped to: CA.
- Cannot be shipped outside the US.
- Cannot be shipped to: AA, AE, AP, AS, FM, GU, MH, MP, PR, PW, VI.



