Fox Labs

Fox Labs MK-4, 2% 5.3 mm OC/UV, Cone Fog, Flip Top, 3oz

Fox Labs MK-4, 2% 5.3 mm OC/UV, Cone Fog, Flip Top, 3oz

Fox Labs MK-4, 2% 5.3 mm OC/UV, Cone Fog, Flip Top, 3oz

$15.99 - $22.39
Product Code:

Product Variation:
3.0 oz (MK-4) 4.0 oz (MK-5)
Select your options above to check stock status.
Product SKU:


This 3-ounce unit contains the world famous FIVE POINT THREE® formula, used by the U.S. Military, all types of municipal, county, state and federal law enforcement agencies, and civilians around the world.

 Cone Fog pattern reaches 12 to 15 feet. All FIVE POINT THREE® formulas are oil based, Taser safe and non-flammable.
  • 4-3/4” High x 1-3/8” Diameter
  • Discharges 26-28 one-half second bursts
  • Spring loaded flip top helps prevent accidental discharge
  • Invisible UV dye for suspect identification under black light.
  • Nonflammable & Taser safe
  • Birth date on each unit
  • Up to a 3 year warranty
  • Available in 3 oz. MK-4 or 4 oz MK-5
FOX premium defense sprays provide the fastest-acting and most reliable formulas available. They also use the largest nozzle openings, meaning instead of discharging only a gram or less of formula per ½ second burst, these units discharge an astounding 3 grams!
The primary benefits of discharging a greater volume per burst are increasing your odds of hitting your assailant in the face and eyes with the incredible FOX formula, thereby stopping them faster. Remember, no matter how good the formula, if you do not hit the subject in the face and eyes, you greatly reduce your chances of stopping them as fast as you would like to do.
So, your decision is this: do you want a product that sounds good, or one that performs great? It is your safety, and your choice. If you do a bit more research you will find that FOX LABS has earned their reputation through proven performance. 

Fox Labs International's Premium Defense Spray Products® are formulated to be the safest, hottest and most effective you can buy! All of their sprays are non-flammable, Taser-safe, and available in a wide range of sizes with varying percentages of pepper (OC), combinations of pepper and tear gas (CS) and ultra-violet dye. You will also find a spray pattern to fit your every need, including Fox's famous heavy stream and medium emission cone-fog sprays for their 2, 3 and 4-ounce units. Upon close inspection you will find that only the highest quality materials and components are used in the manufacturing of these products.

2 Million Scoville Heat Unit (SHU) Rating

All Fox Premium Aerosol Defense Sprays® use organic pepper resins that have at least a true 2,000,000 Scoville Heat Unit (SHU) rating. Fox Labs was the first company to use resins with this intense rating in a 5% product and their formulas are still unsurpassed! In 1998, they became the first and only company offering a true 5.3 million SHU resin in a 2% solution. These formulas are legendary! Don’t take their word on it. Browse the Internet and see what people in general, and LE professionals specifically have to say. Additionally, the word ‘true’ is very important, because some companies have their own systems of heat measurement, or they are not even using organic resins, but rather something called PAVA, which is artificial OC, and not nearly as effective as the real stuff. What that means to you, specifically, is that they may say their sprays have the same intensity as FOX, but in reality they are far weaker, and less likely to afford you the same kind of results when you need them.

The bottom line is this: If you are serious about wanting the absolute best products of their kind you really must consider the FOX line-up of superlative aerosol defense sprays. Once you use them we know that you will agree with the hundreds of thousands of police officers, deputies, corrections officers, government and military personnel and civilians, that already believe there are none finer in existence.


Special discounts may apply for high volume sales. Contact our Bids & Quotes department for more information.

You may also like:

Free Contiguous US Economy Shipping over $75
Free Contiguous US Economy Shipping over $75