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Extension fits Marlin Lever 1983 & later**
Extension fits Marlin Lever 1983 & later**
Extension fits Thompson Center Contender, S&W 29
Extension fits Marlin Model 36 '36-'47, Model 336 '48-'56
Extension fits Marlin Lever 1983 & later**
Extension fits Marlin Lever 1983 & later**
Extension fits Thompson Center Contender, S&W 29
Extension fits Marlin Model 36 '36-'47, Model 336 '48-'56
None
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GROVTEC US, INC. - GT™ HAMMER EXTENSIONS

5 Reviews
Make Model Fit
Brownells #
100005621, 100005622, 100041551
MFR #
GTHM-74, GTHM-79, GTHM308
UPC
895474001741, 895474001796, 811071013161
$9.99
Coupon Code
Purchase Limit Help

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International purchase information

What is the GROVTEC US, INC. - GT™ HAMMER EXTENSIONS?

Clamp-on steel extension adds a serrated lever to the side of the hammer spur to give your thumb a large, easy-to-find horizontal grasping surface. A must-have if using a low-mounted scope, heavy gloves, or you just want a hammer that’s easy to grasp under stress or in wet weather. Hollow design keeps weight to a minimum, so hammer speed and locktime are unaffected. Holds tight on left or right side of hammer with steel Allen head screw.


SPECS: Steel, blued, matte finish. Extension - 5?8" (15.5mm) long x 3?8" (9.2mm) diameter.



*Including Big Bore and angle-eject (not 94/22).

** Including 39A, 39M, 1894, 1894C, 1895S, 336C, 336T, 375, 444S, Glenfield 30A.


Specifications

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Restriction

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GT™ HAMMER EXTENSIONS REVIEWS

3.8
5 Reviews
5 Stars
40%
4 Stars
20%
3 Stars
20%
2 Stars
20%
1 Stars
0%
Reviews Summary
The GT™ Hammer Extensions receive mixed reviews on compatibility, with some users finding them perfectly fitting while others faced challenges. Installation is described as straightforward, and many appreciated the enhanced functionality for easier hammer operation. However, potential buyers are advised to measure their hammers for a proper fit.
What Reviewers Are Saying
Fit and Compatibility
60%
Reviews show a divide in user experiences regarding fitment, with some extensions fitting perfectly, while others required modifications. This emphasizes the necessity for precise measurements to ensure compatibility with various rifle models.
Ease of Installation
40%
Users found the installation process generally easy and straightforward, appreciating the design that accommodates seamless integration with their rifles. This aspect contributes to positive user experiences.
Functionality Enhancement
50%
Many reviewers highlighted the enhancements in hammer operation, noting that the extension made it easier to cycle the hammer, which significantly improved usability and comfort for the shooter.
User Knowledge and Preparation
30%
A common theme among reviews underscores the importance of user preparation, particularly measuring hammers before purchase. This indicates that thorough research is key to ensuring a satisfactory outcome with the product.
Workmanship Quality
40%
Several customers commented positively on the quality and craftsmanship of the hammer extensions after successful installation, which reflects well on the overall perception of the product's build.
5
Looks like it was made to fit.
The hammer extension was easy to install on my new lever gun. The fit was great since it looks like it was made to match up with the hammer. It makes the hammer on the rifle easier to pull without the danger of gouging your thumb. It adds nice fit and finish to the rifle.
by Gee on March 23, 2016
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5
Excellent addition
Fit my 1894CS mde in 95' perfectly. Comes with extension, allen bolt with blue threadlok, and allen key. Not only can I mount a scope far back now it makes it much easier to cycle the hammer by finger. Probably reduces the felt hammer cocking tension by half.
by Big E on June 14, 2015
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4
Hammer Spur Extension
It doesn’t fit as I was told it would. It is a Remington made M1895 in 45-70.
by KIM ZIMMERMAN on November 13, 2023
Verified Purchase
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3
Doesn't fit newer Marlin 336
If you order this part for a recent (in the last ten years) Marlin 336, you'll have to file on it. In fact, you'll have to file a LOT to make it fit! If you're not comfortable with taking a file to a brand new part, I'd suggest you buy another brand of hammer extension as this won't work otherwise.
by Wayne on October 24, 2025
Verified Purchase
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2
Hammer extension for Marlin 1894CL rifle
This hammer extension was to fit my 1975 manufacture Marlin 1894CL. It did not fit as specified. Slot for hammer to go into was .318" wide, rifle hammer .359" wide. Working with some small files to remove the required metal was easily done. After fitting, satisfied with fit and workmanship of product. Bob
by Bob on June 20, 2017
Was this review helpful? 1
Customer Questions
0 Questions