Mountaineer And Ultra-Lite Muzzleloader FPJ Breech Plug


  • Breech Plug fits: Knight Mountaineer, All Calibers
  • Ignition System: Full Plastic Jacket


Keep your black powder rifle in top condition with the Mountaineer Muzzleloader FPJ Breech Plug from Knight Rifles. This breech plug fits all Knight Mountaineer rifles that use our patented Full Plastic Jacket® ignition system. This particular breech plug fits all Knight Mountaineer models, regardless of caliber (.45, .50, .52).

Nothing effects the performance of your muzzle-loader more than the breech plug. Continuing in our tradition of bringing innovation to the muzzleloading industry, we redesigned our breech plugs to better accommodate modern black powders. Now you can shoot more and clean less! We are confident that our Knight Mountaineer Muzzleloader FPJ Breech Plug delivers the best quality and reliability you can find on the market today! You can also expect superior quality since every single breech plug we sell is 100% American Made. Get yours today!

Mountaineer Muzzleloader FPJ Breech Plug Features

  • Fits all Knight Mountaineer and Ultra-Lite rifles that use the Full Plastic Jacket ignition system.
  • Fits: .45, .50, and .52cal models

Note: Knight Mountaineer® breech plugs are specifically designed for the Mountaineer only. This breech plug will not work with other Knight models. Please call us at 1-866-518-4181 if you need any assistance finding the right breech plug for your rifle.

For safety reasons, all Knight breech plugs and/or breech plug kits cannot be returned or exchanged. ALL SALES ARE FINAL.

Have Questions?

If you have questions about our Mountaineer Muzzleloader FPJ Breech Plug please call us at 1-866-518-4181 or email us at

Knight Rifles, America’s Muzzeloader!

You may also like…