The Henning Group +5 magazine extension boosts your Glock 19 and Glock 26 magazine capacity by five rounds — taking a G19 from 15 to 20 rounds and a G26 from 10 to 15 rounds. CNC-machined from 6061-T6 billet aluminum and paired with an upgraded stainless steel magazine spring, it is a proven, competition-tested upgrade trusted by law enforcement and USPSA practical shooters.
The extension is a true extension of the internal shape of the factory magazine tube, so rounds feed smoothly and reliably at the higher capacity. It installs in minutes and locks securely to the magazine body with a black nitride-finished cap screw — the ultimate way to add capacity to your compact or sub-compact 9mm Glock.
Pair your extended magazines with the rest of our most popular Glock upgrades and accessories:
Add a precision direct red dot optic cut to your Glock slide for a lower, more secure optic mount.
Reduce muzzle flip and speed up follow-up shots with professional slide and barrel porting.
Upgrade to a cleaner, flatter trigger for a smoother, more consistent break on every shot.
Drop magazines faster and reload with confidence using an extended, reversible Glock magazine catch.
Add grip and a custom look to your baseplates and frame with durable Howies winter camo tape.
It adds five rounds, bringing a Glock 19 from 15 to 20 rounds and a Glock 26 from 10 to 15 rounds.
Yes. The extension is designed for factory Glock 19 and Glock 26 9mm magazines and works across Gen 3–5.
Yes — a stainless steel magazine spring is included to ensure reliable feeding at the higher capacity.
GLOCK® is a federally registered trademark of GLOCK, Inc. and is one of many trademarks owned by GLOCK, Inc. and GLOCK Ges.m.b.H. Neither Stonebridge Gunworks LLC 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's trademarks is for descriptive and nominative purposes only.
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