Mountaineer and Ultra-Lite Muzzleloader FPJ 209 Breech Plug


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

This item usually processes in 3 to 5 business days.

In stock

This part will work on the following rifles:



Mountaineer and Ultra-Lite Muzzleloader FPJ Breech Plug

Keep your black powder rifle in top condition with the Mountaineer and Ultra-Lite 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 affects 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.


Knight muzzleloaders are the finest and most accurate black powder rifles ever made. Each rifle embodies the beauty of American manufacturing with many features like beautiful laminate stocks that give a look and feel of perfection. In addition, accuracy is guaranteed when you consider Knight uses only the finest handcrafted Green Mountain barrels. This combination of beauty and accuracy is only available with Knight. From the smallest screw to the stock and barrel, everything is 100% American made


From cleaning supplies, bullets, sabots, loading tools, conversion kits – including the Knight Muzzleloader Ramrod Lock. To scopes, rifle cases, and slings, targets, binoculars, and apparel. We have just about anything you’d need for your Knight Rifle. Be sure to check out the shop and see all of the different accessories we offer.

Have Questions?

If you have questions about our Mountaineer Muzzleloader FPJ Breech Plug please email us at

Knight Rifles, America’s Muzzeloader!