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Grovtec

GrovTec Hammer Spur Extension Marlin (1983 and later) 39A 39M GTHM74

Our editorial team reviews specifications, product data, and field-use information to keep pages accurate.

Larger Contact

Surface for hammer operation

Adds Grip

Control to the firearm

Useful Scoped

Hammer clearance is limited

Designed Fit

Hammer specifically

Can Be

Mounted from either the right

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SKU: GTHM74-895474001741

Overview

Designed for Marlin 39A and 39M rifles from 1983 and later, this hammer spur extension adds a larger contact surface to make cocking the hammer easier and more controlled. It is especially relevant on scoped rifles where clearance can make access to the hammer more difficult. The extension can be mounted from either the right or left side, giving flexibility in setup. Its stainless steel construction keeps the focus on a simple, practical upgrade for hunters who want improved hammer control without changing the rifle’s basic handling.

Why Hunters Choose the Grovtec

Larger Contact

Surface for easier hammer manipulation

Adds Grip

Control during cocking

Useful Scoped

Clearance can be limited

Can Be

Mounted from either the right

Durable Stainless

Steel construction

Key Features

  • Provides a larger contact surface for hammer operation
  • Adds grip and control to the firearm
  • Useful on scoped guns where hammer clearance is limited
  • Designed to fit the hammer specifically
  • Can be mounted from either the right or left side
  • Durable stainless steel construction

Best Used For

  • Hunters using scoped Marlin 39A or 39M rifles who need easier hammer access
  • Shooters wanting added contact surface and control when cocking the hammer
  • Right- or left-handed users needing flexible side mounting options
  • Owners of Marlin 1983-and-later rifles seeking a simple hammer extension

Specifications

Compatible FirearmMarlin (1983 and later) 39A 39M
Contact SurfaceLarger contact surface
GripAdds grip control to firearm
MaterialStainless steel
Mounting SideRight or left side
Product TypeHammer Spur Extension
Specifications And FeaturesDurable stainless steel construction; Adds grip control to firearm; Left or right side mounting
Use CaseScoped guns where clearance is an issue

Pros

  • Provides a larger contact surface for easier hammer manipulation
  • Adds grip and control during cocking
  • Useful on scoped guns where clearance can be limited
  • Can be mounted from either the right or left side
  • Durable stainless steel construction

Considerations & Trade-offs

  • Designed specifically for Marlin 39A and 39M models from 1983 and later, so compatibility is limited to that fitment range.
  • The added hammer extension changes the hammer profile, which may be a consideration for users who prefer the original configuration.
  • It is especially useful where scope clearance is tight, but that benefit is most relevant on scoped rifles rather than all setups.
  • Mounting can be done from either the right or left side, but installation still depends on proper fit to the hammer and firearm setup.

Suggested Comparisons

  • Hammer extensions
  • Firearm cocking aids
  • Marlin rifle accessories
  • Scoped rifle handling accessories

Suggested Accessories

  • Gun cleaning kit
  • Gun vise
  • Scope mount
  • Rifle sling

Frequently Asked Questions

What firearms is this hammer spur extension made for?

It is listed for Marlin 39A and 39M rifles from 1983 and later.

Why would a hunter use a hammer extension like this?

The product description says it provides a larger contact surface and added grip and control, and it is especially useful on scoped guns where clearance makes cocking the hammer more difficult.

Can it be mounted on either side?

Yes. The provided specifications say it may be mounted from either the right or left side.

What material is it made from?

The listed specification is durable stainless steel construction.

Does the product description give exact dimensions or weight?

No. The provided data does not include dimensions or weight.