Description
Mounting a scope on a Winchester 94/22 lever gun is a smart move for accuracy, but it tends to leave your thumb fighting for room around the hammer. That's exactly the problem GrovTec's GTHM69 hammer extension solves. It clamps onto your factory hammer and adds a horizontal wing that gives you a bigger surface to grab, so cocking the action stays quick and sure even with an optic sitting close overhead.
What the GTHM69 Does on Your 94/22
This extension is machined from steel with a black finish, so it holds up to real use and matches the look of the rifle. It's cut specifically for the Winchester 94/22 and 94/22M hammer, with a slot sized to that gun so it seats where it should. One handy touch is that you can run it on the right or left side depending on how you like to thumb the hammer, which is a nice bit of flexibility for lefties or anyone who just prefers a certain reach.
Fitting Your GrovTec Hammer Extension
Installation is straightforward and most folks have it on in a couple minutes with basic hand tools. Because factory hammers aren't all cut to identical tolerances, you may need to lightly file the opening for a snug, wobble-free fit. A small metal file does the job, and a touch of cold blue will recoat any bare steel afterward. On the 94/22M specifically, it's worth checking that the extension clears the breech block when you cycle the action, then position it so nothing drags.
Once it's dialed in, this little part makes a scoped 94/22 feel a whole lot friendlier to run. It's an inexpensive upgrade that fixes a real annoyance, and it's the kind of thing you'll wonder how you shot without.
Key Specifications
- Manufacturer: GrovTec
- Manufacturer Part Number: GTHM69
- UPC: 895474001697
- Fits: Winchester 94/22 & 94/22M
- Product Type: Hammer Extension
- Style: Horizontal
- Material: Steel
- Finish: Black
- Mounting: Right or left side
- Hammer Slot Dimensions (W x H): 0.315" x 0.125"
- Length: 4.95 in
- Origin: Made in the USA
What’s Included
- GrovTec GTHM69 hammer extension for Winchester 94/22
Frequently Asked Questions
Will the GTHM69 fit my Winchester 94/22M?
Yes, this extension is made for both the Winchester 94/22 and the 94/22M. On the magnum version it's a good idea to check that the extension clears the breech block as you work the action, then set its position so nothing drags. Once placed correctly it cocks smoothly and gives you a solid grip.
Do I need any tools to install this hammer extension?
Installation only takes basic hand tools and a few minutes. Since factory hammers vary slightly in size, you may need to lightly file the slot opening for a tight fit. A small metal file handles that, and a bit of cold blue touches up any bare metal afterward.
Can I mount it on the left side for a southpaw setup?
You can. The GrovTec 94/22 hammer extension can be installed on either the right or left side of the hammer. That makes it easy to set the reach up however feels natural for your thumb.
Why would I want a hammer extension in the first place?
Once you mount a scope on a lever gun, the optic can sit close enough to the hammer that reaching it gets awkward. The extension adds a horizontal wing that widens the contact surface, so you get more room and a surer grip when cocking. It's a small, low-cost fix for a common scoped-rifle headache.





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