GrovTec GTHM70 Hammer Extension Marlin Lever Action 1957-1982

The GrovTec GTHM70 Hammer Extension transforms operation of vintage Marlin lever-action rifles manufactured between 1957-1982. This precision-machined steel component extends the hammer spur, providing enhanced leverage and easier cocking for shooters with larger hands or when wearing gloves.

What Makes This Different

Unlike universal hammer extensions that require permanent modification, the GTHM70 installs without gunsmithing or alterations to the original firearm. The extension maintains the rifle's classic profile while adding 0.5 inches of additional leverage. CNC-machined from solid steel bar stock, this component delivers the durability demanded by working rifles that see regular field use.

Key Features

• Direct replacement for factory hammer on Marlin lever rifles 1957-1982
• Adds 0.5 inches of hammer spur length for improved leverage
• 4140 steel construction with black oxide finish prevents corrosion
• Drop-in installation requires no permanent firearm modifications
• Maintains original hammer geometry and timing
• Compatible with Models 336, 444, 1895 from specified years
• Textured contact surface provides secure grip in wet conditions

Field performance shows immediate improvement in hammer manipulation, particularly beneficial during cold weather hunting when heavy gloves reduce dexterity. The extended spur allows positive cocking action without fumbling, crucial for follow-up shots on dangerous game. Competition shooters report faster cycling times in cowboy action events where speed matters. The black oxide finish matches factory components and resists wear from repeated use.

Technical Specs

• Material: 4140 steel with black oxide finish
• Extension length: 0.5 inches beyond factory hammer
• Weight: 0.8 ounces
• Compatibility: Marlin lever rifles manufactured 1957-1982
• Installation: Drop-in replacement, no gunsmithing required
• Country of origin: United States
• Manufacturer: GrovTec US Inc

This hammer extension addresses a common complaint among Marlin enthusiasts without compromising the rifle's original character. The steel construction ensures decades of reliable service, making it a permanent upgrade for vintage lever guns still earning their keep in the field.