GrovTec - Hammer Extension for Marlin Lever Actions (1983 & Later)

The GrovTec Hammer Extension is designed to enhance the accessibility and control of Marlin Lever Action firearms, particularly when a scope is mounted. By extending the hammer, it allows for easier cocking and operation of the firearm, especially in situations where the scope might obstruct direct access to the hammer. This is particularly beneficial for hunters and shooters who need reliable and quick access to their firearm's hammer in the field.

This GrovTec Hammer Extension is compatible with Marlin Lever Actions made in 1983 and later, including models such as the 39A, 39M, 1894, 1894C, 1895S, 336C, 336T, 375, 444S, and Glenfield 30A. It is important to ensure your firearm model is listed to avoid compatibility issues. The extension fits hammer slot dimensions of 0.375" x 0.094", so checking these measurements on your firearm can also help confirm compatibility.

Installing the GrovTec Hammer Extension involves sliding the extension onto the hammer's slot. In some cases, minor fitting may be required to ensure a snug fit. This can be done with a small metal file to adjust the dimensions slightly. After fitting, you may need to use liquid bluing to re-coat any exposed metal to prevent rust and maintain the firearm's appearance.

If the GrovTec Hammer Extension does not fit perfectly, minor adjustments can be made using a small metal file. Carefully file the extension or the hammer slot to achieve the correct fit. It is crucial to proceed slowly and check the fit frequently to avoid removing too much material. Once adjusted, apply liquid bluing to any exposed metal to protect against corrosion.

While the GrovTec Hammer Extension is designed to improve accessibility with scoped firearms, it may not completely eliminate all obstructions. The effectiveness of the extension can vary depending on the size and placement of the scope. It's important to test the setup to ensure the extension provides the necessary clearance and ease of use in your specific configuration.

Liquid bluing is recommended after fitting the hammer extension to protect any exposed metal surfaces. Filing the extension or hammer slot may remove the protective finish, leaving the metal vulnerable to rust and corrosion. Applying liquid bluing restores the protective layer, helping to maintain the firearm's integrity and appearance over time.

The GrovTec Hammer Extension is specifically designed for the listed Marlin Lever Action models and is not recommended for use on other firearms. Using it on unlisted models could result in improper fit or function, potentially compromising the safety and performance of the firearm. Always ensure compatibility with your specific model before installation.

Using a hammer extension on a lever action rifle provides enhanced accessibility and control, particularly when a scope is mounted. It allows for easier cocking of the hammer without the need to reach around or under the scope. This can be crucial in hunting or tactical situations where quick and reliable access to the hammer is necessary for effective firearm operation.

The GrovTec Hammer Extension can improve firearm safety by providing more precise control over the hammer. With the extension, users can more easily and securely cock the hammer, reducing the risk of accidental discharge. This added control is particularly beneficial in high-pressure situations where quick and safe operation is critical.

Regular maintenance of the GrovTec Hammer Extension involves checking for secure attachment and applying a protective coating if necessary. Periodically inspect the extension to ensure it remains tightly fitted to the hammer. If any rust or wear is observed, reapply liquid bluing or another rust-preventative treatment to maintain its condition. Keeping the extension clean and free of debris will also ensure smooth operation.