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Defense Technology Inert MK-3, 1.47oz, Stream/Fogger

SKU: W-DEF-5139//Mixed Availability


Choose Stream, 360° Stream, Foam, or Fogger.

Fully-functioning aerosol dispensers filled with an inert solution for training purposes.

Defense Technology offers inert aerosols in all delivery systems and most projector types.

Defense Technology Inert is available in MK- 3, MK-4, MK-6, and MK-9 aerosol projectors; as well as MK-21 and MK-46 extinguisher aerosol projectors.


  • Formulation:​ Inert solution
  • Delivery Systems​: Stream, 360° Stream, *Foam, or *Fogger
  • Additional Specs: See product listing for individual propellant and performance specifications.


Material Safety Data Sheet:
Click: Defense Technology 5139 MSDS.pdf for MSDS
May be used to comply with OSHA's Hazard Communication Standard, 29CFR 1910. 1200.
Standard must be consulted for specific requirements.


  • Material: Aluminum (seamless construction) Part 178.33a Specification 2Q
  • Height: 4.35 inches/11.0 cm
  • Diameter: 1.50 inches/3.8 cm
  • Warranty: 5 years from date of manufacture

SAFE AND EASY TO USE: A protective, spring-loaded black plastic safety cover is attached to the upper portion of the outer casing above the actuator. The Flip Top actuator assists in directional holding, aiming, and discharging of the device during all light conditions. The cover prevents accidental discharge of the unit and conveniently moves out of the way with the approach of the thumb or finger to permit easy access to the actuator. No separate lifting motion is required to activate the device.

INDIVIDUALLY SERIALIZED: wear and water-resistant labels affixed to all units permit easy identification. Lot numbers for formulation are present for quality assurance tracking.

Available in Stream, 360° Stream, Foam, or Fogger.


Before deciding to purchase a pepper spray, you should check with your local law enforcement department for specific laws on possession of, permissible uses of, and restrictions on pepper spray products in your city, county, or state. The following states have shipping restrictions on pepper spray:

States and Districts Where Pepper Sprays are Restricted

  • New York: Sold in pharmacies and by licensed firearms dealers. Animal sprays ordered online are legal.
  • Massachusetts: Sold by licensed firearms dealers. Animal sprays ordered online are legal.
  • Wisconsin: Pepper spray only, no stronger than 10% concentrate. Safety features required. Weight allowed 15-60 grams.
  • California: Weight restricted to 2.5 ounces (about 70 grams).
  • Washington D.C.: You must register with the police for possession of pepper spray.

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