Grovtec Marlin 36/336 Hammer Extension GTHM308

GrovTec Marlin 36/336 Hammer Extension – GTHM308

The GrovTec GTHM308 is a drop-in hammer extension purpose-built for the Marlin Model 36 (1936–1947) and Marlin 336 (1948–1956). Designed for shooters who want faster, more positive hammer manipulation — especially with gloves on or in low-light conditions — this extension gives you a larger, more accessible hammer spur without permanent modification to your lever-action. A practical upgrade for hunting season or range use on a classic Marlin.

Fits hammer opening dimensions of 0.285" × 0.159". Minor fitting may be required as hammer tolerances can vary between individual firearms.

• Fits Marlin Model 36 (1936–1947) and Marlin 336 (1948–1956)
• Hammer opening: 0.285" × 0.159"
• Improves hammer access — ideal for gloved or cold-weather use
• No permanent modification required
• Note: Minor fitting may be required — lightly file the opening if needed for a secure fit. Liquid bluing can be used to re-coat bare metal after fitting
• Not recommended for use on hammers or models not listed above