The ASP Defender LE MK-4 Gel Inert Trainer lets students rehearse with a canister that matches the live MK-4 Defender LE gel but holds no OC (ASP part no. 55121). ASP designed the inert line for realistic training, indoors or out, without exposing trainees to live spray. Form factor, functionality, range and capacity are the same as the live aerosol. A blue canister top and a color-coded actuator keep inert units separate from active product on the shelf and in the field. For an instructor stocking a classroom, the MK-4 trainer gives the same handling as the live canister it stands in for.

Key Specifications

• Contents are inert, with no OC, so a training session carries no live exposure.
• Canister size is MK-4, the size that corresponds to the live MK-4 Defender LE canister.
• The dispersal pattern is gel, matching the delivery of the live gel it trains for.
• Identification comes from a blue canister top and a color-coded actuator, which separate inert from active contents.
• The actuator includes a flip-top safety like the live Defender units.
• Labels carry production and lot data, a serial number and an expiration date for inventory and evidence control.

Frequently Asked Questions

What is the difference between the MK-3 and MK-4 trainers? They are different canister sizes in the Defender LE line, each made to train for the live canister of the same name. This one is the MK-4 with a gel dispersal pattern.

Is any OC inside? No. The canister is inert and contains no OC.

Will it handle like the real thing? ASP states that form factor, functionality, range and capacity match the live aerosols, so deployment practice transfers directly.

Buy the ASP Defender LE MK-4 Gel Inert Trainer

A trainer only works if it feels like the tool it replaces, and this one is built to the live canister’s form and function. Order it from our Lubbock, Texas gun shop for fast shipping, and see the rest of our pepper spray selection.