List: $20.39 |Save: $2.00

Defense Technology First Defense, 360 MK-4, 3.0oz, Stream

In stock in approximately 7 weeks.


The original, patented, fully tested FIRST DEFENSE® OC Formulation—in an improved delivery system.

A true breakthrough in aerosol performance. First Defense® 360º delivers a consistent, stream pattern at any angle, any orientation. Defense Technology's trusted 10% liquid OC formula, allows you to deliver a powerful, target-specific stream, no matter how you orient the can. You can hold the 360º dispenser upright, upside down, or sideways. As long as you can point the nozzle at the target and press the trigger, you can deliver an effective, controlled 10-12 ft. stream with minimal chance of cross contamination or disturbance by wind or rain compared to alternate delivery systems. No additional training or education is required.

Proven over many years of safe, effective use. Today First Defense is the pepper spray of choice for law-enforcement and corrections the world over. Three out of four police departments choose First Defense® OC Aerosols by Defense Technology—not only for their proven effectiveness, but because they are the only such products backed by a comprehensive effectiveness study, and the only products that address the ever-growing concerns over health and environmental risks.

First Defense® Oleoresin Capsicum is water-soluble. It is processed further than oil-based OC to remove natural oils, waxes and fats; yielding a formulation that is clear of color and consistent in its potency. At 500,000 SHU, it’s also the hottest, water-soluble OC available. Based on their extensive research, Defense Technology has determined that their 0.2% capsaicinoid level is optimum for consistent effectiveness. But because First Defense’s water-soluble OC formula decontaminates more easily then oil-based solutions, it's not so excessive that decontamination time or simplicity is compromised.

Non-flammable, environmentally sound, easy to clean. Defense Technology 5.5% Peppermace products use only food-grade OC formulations and chlorine-free propellants, making them non-flammable and biologically friendly. They contain no HCFCs or CFCs. And because the OC concentrate is water-soluble, Peppermace Fogger-delivered aerosols allow relatively easy decontamination of skin and surfaces, using soap and water. Clothing and fabrics can be cleaned by machine washing or dry cleaning. Airborne OC can be cleared from buildings with simple ventilation.

Tested and proven—in the streets, in the lab, and in the courtroom. Defense Technology has never lost or settled a legal claim against them. Ever.

CARRIER (Ingredients): d-Limonene, Secondary Butanol, and Oil-Based OC.

First Defense 360° is available in MK- 3, and MK-4, aerosol projectors.
  • Projector: MK-4 360º, 3.0 oz
  • Formulation: First Defense water-soluble OC (Oleoresin Capsicum)
  • Delivery System: Stream
  • Propellant: Nitrogen
  • Formulation Weight: 3.0 oz / 85.0 grams
  • Number of 1 sec. Bursts: 11-12
  • Effective Range: 10 to 12 feet/ 3-4 meters


Material Safety Data Sheet: 
Click here for: Defense Technology 5449 MSDS.pdf
May be used to comply with OSHA's Hazard Communication Standard, 29CFR 1910. 1200.
Standard must be consulted for specific requirements. 

OC and Pepper Sprays:
Click here for: oc-and-pepper-sprays.pdf


  • 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.

WARNING: Aerosol products described here are intended to be used by authorized and trained Law Enforcement, Correction, Military, and responsible civilian customers. Professionals and customers are expected to know their state's regulations regarding carry and use of these products. Additional product information and training is available from Defense Technology/Federal Laboratories. Handle, store and use with care and caution.


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.
  • Michigan: <35 grams per can, no stronger than 10% concentrate. No combinations.
  • 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.

Ratings & Reviews

No reviews available

Be the first to Write a Review