Knight MK-85: Popularizing The In-Line Muzzleloader

by
posted on July 13, 2022
** When you buy products through the links on our site, we may earn a commission that supports NRA's mission to protect, preserve and defend the Second Amendment. **
Mk85

There’s an undeniable satisfaction in muzzleloading. Attempts at explaining the attraction often claim it’s the added challenge of a single shot, history lesson, skill polished with longer lock times or pleasure when the balancing act between propellant and bullet weight shrink groups. It’s all that and more, but in a gentle mix unique to every enthusiast, a blend that has kept the relatively primitive firearms alive, while others have gravitated to the convenience of metallic cartridges and self-loading guns.

Traditional blackpowder, however, is messy, volatile and requires thorough cleaning after use. That burden prevented some from participating in muzzleloading until 1975, when Hodgdon introduced Pyrodex. The blackpowder substitute eliminated a lot of the headache, although the relatively exposed ignition systems on “smoke poles” still fell victim to inclement weather.

That changed in 1985, when Knights introduced its MK-85. The in-line design launched a revolution in muzzleloading by placing its percussion cap nipple directly behind the chamber, where it was sheltered from rain, snow and spark-robbing humidity to introduce spark to the propellant reliably and consistently.

Company founder Tony Knight is often cited as the inventor of the in-line design, although that honor really goes to Jean Samuel Pauley. His patent for the approach was approved by England in 1812, only two years after the percussion cap was invented. What Knight did receive his initial patent for was an innovative knurled safety on the muzzleloader’s plunger-style hammer. With a simple twist of the knob concerns about a negligent discharge were alleviated, but that wasn’t enough—there was also a trigger safety on the MK-85.

The MK name honors Knight’s daughter, Michelle Knight, followed by the year of its introduction, 1985. It had a 24" barrel and was available in either .50- or .54-caliber. Receivers were drilled and tapped for scope mounting, but the muzzleloaders shipped with a bead up front and adjustable metallic sights at the rear. Sling swivel studs and a recoil pad rounded out the design, which throughout its run was available with wood, wood laminate or synthetics stocks in various camo patterns. With a removable breech plug and hammer, routine maintenance was a breeze.

The design launched a revolution in muzzleloaders, and Knight invested considerable effort to increase the use of so-called "primitive weapons" during big game seasons across the nation. His design and dedication made a huge difference.

Knight sold the company to a father and son in 1991. Pradco purchased it from them in 1999, but sales failed to meet corporate expectations. Knight Rifles closed its doors in 2009. Thankfully, in 2011, Plastic Industries, Inc. resurrected the company and offers a complete line today. Unfortunately, the MK-85 is no longer part of the lineup.

Used MK-85 prices vary wildly, increasing with condition and model. Some of the hand-selected, limited runs that carried an MSRP of $1,000 in the late 1990s go for more today, while you can find field versions in good condition occasionally at or below $300 without optics.  

Latest

Title Figure Colt Police Positive
Title Figure Colt Police Positive

A (Slightly Confusing) History of Colt's Police Positive Revolver

For one of the most popular law-enforcement revolvers ever made, the history of the Colt Police Positive isn't nearly as linear as one would think it'd be.

Honoring America’s 250th and Those Who Defend It

Winchester Ammunition and Bass Pro Shops logos were both featured on the No. 3 Richard Childress Racing Chevrolet in the 2026 Coca-Cola 600 race in May.

I Have This Old Gun: Walther P38

On the eve of World War II, the German military sought a new sidearm that was easier to manufacture than the P08 Luger. Its answer was the P38.

C&H Precision STRYKR: A Red-Dot Sight for PDWs

The C&H Precision STRYKR is a hard-use, enclosed-emitter optic designed for PDWs and compact carbines.

Rifleman Interview: Smith & Wesson M&P15-22 OD Green Topographic Rifle

At “Plinkapalooza” in May we had a chance to try out the latest Smith & Wesson M&P15-22 rifle.

Patriots Landing Announces "A Nation Remembers" Veterans Weekend

Patriots Landing, a faith-based veterans workshop based in Kentucky, announced it would hold "A Nation Remembers" veterans weekend in Grant County, Ky., from Sept. 16-20.

Interests



Get the best of American Rifleman delivered to your inbox.