The Lyman Great Plains Touch Hole Liner (SKU: LY-THL) is a high-quality, factory-standard replacement ignition component designed specifically for traditional flintlock muzzleloaders. This critical vent liner serves as the physical pathway that channels the spark and incandescent heat from the external priming powder flash in the pan directly into the barrel's main powder charge. Over time, the highly corrosive nature of black powder combustion gases can erode, burn out, or enlarge the touch hole, resulting in gas leakage and inconsistent ignition. Replacing a worn liner with this stainless steel component restores your rifle to its original factory performance, ensuring fast, reliable ignition and preventing dangerous hangfires.

Key Features:

• Internal Coning: Features a concave, coned interior design that allows the main black powder charge inside the breech to sit closer to the exterior priming flash, significantly reducing ignition delay.
• Corrosion-Resistant Material: Manufactured from factory-standard stainless steel to withstand the harsh, corrosive environment created by black powder combustion.
• Slotted Head Drive: Designed with a slotted head for straightforward removal and installation using a standard flathead screwdriver during deep cleaning or replacement cycles.
• Direct OEM Fit: Engineered to sit flush with the barrel wall of compatible octagon muzzleloader barrels, maintaining the correct physical profile and gas seal.

Product Specifications:

• Brand: Lyman
• SKU: LY-THL
• Thread Specification: M6 x 0.75 mm metric thread
• Material: Stainless steel
• Drive Type: Slotted head
• Weight: Under 5 grams
• Compatibility: Specifically engineered for Investarms-produced Lyman muzzleloading flintlock rifles, including the Lyman Great Plains Rifle, Lyman Trade Rifle, and Lyman Deerstalker. It also fits compatible Investarm Gemmer Hawken models.

Who It Is For:

The Lyman Great Plains Touch Hole Liner is an essential spare part for Australian black powder shooters, muzzleloader hunters, and historical re-enactors who operate Lyman or Investarms flintlock firearms. Because flintlock ignition relies on precise gas dynamics, maintaining a sharp, non-eroded vent path is vital for competitive target shooting and ethical hunting. In the Australian market, this product is classified as a purely mechanical, non-electrical firearm accessory, meaning it requires no electrical certifications. While it is generally a non-controlled component in most Australian states and territories, owners should always verify local state police licensing requirements regarding muzzleloader maintenance and spare parts.