Henning +6 Basepad and Spring 140mm for Carry Optics & Limited Optics fits Glock 9mm (17/34/47)

The Henning H141-GS9 is a competition magazine extension kit for Glock 17, 34, 19X, 45, and 47 pistols — CNC-machined from 6061-T6 billet aluminum and paired with a 13-coil stainless steel spring. It extends your factory 17-round Glock magazine to 23 rounds at 141.25mm, keeping you within the USPSA gauge for Carry Optics, Limited, Limited Optics, and 3-Gun divisions. Designed by Henning Wallgren, a veteran USPSA and IPSC champion who has been competing and developing competition gear since 2006.

Specifications

• SKU: H141-GS9
• Capacity gain: +6 rounds (17→23 on factory Glock 17/34 magazine)
• Final magazine length: 141.25mm (5.56") — passes USPSA gauge
• Material: CNC-machined 6061-T6 billet aluminum
• Spring: 13-coil stainless steel extended magazine spring (included)
• Retention: Black nitride finished cap screw
• Fit: Tight-fit to factory Glock magazine body

Compatible Glock Models

Fits factory Glock G17, G34, G19X, G45 and G47 magazines in 9mm. Also installs on factory 31-round and 33-round Glock magazines — use the factory spring on those (the extended spring is only needed on 17-round tubes).

Spring Options

This listing includes the Henning extended spring with factory follower — the standard setup for 17-round magazines extending to 23 rounds. A second option is available:

• MBX Follower + Spring upgrade: Increases capacity from 17 to 24+1 rounds. No slide lock on empty. For 17-round mags only. Available separately — see our Glock magazine followers.

Division Legality

At 141.25mm installed length, this basepad is USPSA legal for:

• Carry Optics
• Limited
• Limited Optics
• Limited 10
• Open
• 3-Gun

Not legal for Production division, which limits magazines to 10 rounds.

Installation

Remove the factory baseplate, pull the spring and follower, replace with the included Henning spring, compress, and slide the new basepad on. The cap screw secures the pad to the magazine body. No modifications to the magazine tube required.

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.