Description
If you have ever mounted a scope on a Thompson Center Contender or a Smith & Wesson Model 29 and found yourself fumbling for the hammer with the optic in the way, this GrovTec hammer extension is the fix. It bolts a wider horizontal spur onto your factory hammer, giving your thumb a bigger, more positive surface to work with. That extra real estate means faster, more confident cocking whether you are on the bench, in a stand, or wearing gloves in cold weather.
What the GrovTec Hammer Extension Does for Your Shooting
The whole point here is contact and clearance. Adding a horizontal extension to the hammer gives you a larger grip surface, which translates to better leverage and control every time you draw the hammer back. It is especially handy on scoped setups where the optic sits close and eats up the clearance you used to have. The knurled texturing on the spur keeps your thumb from slipping, so a wet or gloved hand still gets a solid purchase.
Fitment and Setup on the GrovTec Spur
This one is cut specifically for the T/C Contender and the S&W Model 29, and plenty of owners report it works on the Encore as well. It will not fit the G2 Contender, so keep that in mind before ordering. The spur mounts on either the right or left side to match your handedness or to clear an optic and other mounted gear, and it locks down with a double set screw arrangement. Because hammer dimensions vary a bit from gun to gun, a little minor fitting now and then gets you the snuggest result.
Built to Take Abuse
Made from steel with a black-oxide finish and produced in the USA, this extension is built to hold up to years of range time and hunting seasons. It is a small, inexpensive part that solves a real annoyance, and folks who run scoped single-shot pistols and revolvers tend to wonder how they got along without one.
Key Specifications
- Manufacturer: GrovTec
- Manufacturer Part Number: GTHM79
- Model: GTHM79
- UPC: 895474001796
- Product Type: Hammer Extension
- Fits: T/C Contender, S&W Model 29 (not G2 Contender)
- Material: Steel
- Finish: Black Oxide
- Color: Black
- Mounting: Right or left side, double set screw
- Length: 4.85 in
- Country of Origin: USA
What’s Included
- GrovTec hammer extension spur
- Mounting set screws
Frequently Asked Questions
Will this GrovTec hammer extension fit my G2 Contender?
No. This spur is made for the original T/C Contender and the S&W Model 29 and will not fit the G2 Contender. If you run an original Contender or an Encore, you are in good shape, since many owners report it works well on the Encore too.
Which side does the hammer extension mount on?
It can go on either the right or left side of the hammer. That lets you set it up for your handedness or position it to clear a scope and any other mounted accessories.
Does it help when I have a scope on my pistol?
That is exactly what it is built for. When an optic sits close to the hammer and eats up your thumb clearance, the extended spur gives you room and a bigger surface to cock the gun quickly and confidently.
How does the GrovTec spur stay put on the hammer?
It locks down with a double stacked set screw setup that firmly secures the spur in place. Because hammer dimensions vary slightly between guns, a little minor fitting can help you dial in the tightest fit, and owners report it holds up without working loose in use.






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