The Uncle Mike’s Hammer Extension (part no. 24520) slips over the factory hammer on Marlin lever-action rifles built from 1957 to 1982, giving your thumb real leverage on a hammer that’s otherwise hard to reach or hard to cock with a scope mounted up top. Uncle Mike’s builds it from blued steel with a knurled surface for a sure grip in cold or wet conditions, and it slips onto most hammer-type actions from either the right or left side. An Allen wrench is included for a quick, tool-included install. If you’ve ever fumbled a scoped Marlin’s hammer at the worst moment, this is the fix.

Key Specifications

• Purpose-built to fit Marlin lever-action rifles from 1957 to 1982, per the manufacturer’s fit window.
• Slips over the factory hammer to add cocking leverage on hard-to-reach or hard-to-cock hammers.
• Machined from blued steel for a finish that matches factory blued Marlin receivers.
• Features a knurled surface for a secure grip in gloved or wet-hand conditions.
• Mounts on either the right or left side of most hammer-type actions.
• Ships with an Allen wrench included for a complete, tool-ready installation.
• Designed for standard hammer profiles; not for low-wall or high-wall actions.

Frequently Asked Questions

What rifles does this fit? Marlin lever-action rifles manufactured between 1957 and 1982.

Does it work for left-handed shooters? Yes, it slips over the hammer from either side.

Do I need my own tools to install it? No, an Allen wrench is included with the extension.

Buy the Uncle Mike’s Hammer Extension for Marlin Lever Actions

A scope-mounted lever gun shouldn’t cost you a clean thumb hold on the hammer, and this extension solves that in one simple part. Order it from our Lubbock, Texas gun shop for fast shipping, along with more gun parts and accessories for your lever action.