The ASP D2 Heat and Test Twin Pak Insert for Metro Defender (ASP part no. 55114) is a replacement insert for ASP D2-size Defenders, the size formerly sold as the Key Defender insert. This Twin Pak pairs one Heat (OC) insert with one inert Test insert, so you can practice first and then load the live one. The Heat formula is ASP maximum-strength, law-enforcement-grade OC.

Key Specifications

• This listing is a Twin Pak with one Heat (OC) insert and one Test (inert) insert.
• The Heat insert is 10% oleoresin capsicum with 1.4% major capsaicinoids, rated by ASP at two million Scoville Heat Units.
• The Heat insert includes invisible UV dye, added for 2024 to help law enforcement identify an assailant.
• The Test insert holds a harmless, inert aerosol for practicing without active OC.
• Both inserts are precision machined from aerospace aluminum and solid brass with a patented dispensing mechanism.
• Heat inserts are date-coded, and the insert should be disposed of in line with local environmental rules after its marked date.
• Both fit Metro D2 and Sport D2 Defenders, and the older Key Defender takes the same insert size.

Frequently Asked Questions

What is in the Heat and Test Twin Pak? One Heat (OC) insert and one Test (inert) insert for ASP D2 Defenders.

Why include a Test insert? ASP recommends practicing with a Test insert before carrying the Defender with the active insert installed.

Will it fit a Metro Defender D2? Yes. It is compatible with ASP Metro D2 Defenders and Sport D2 Defenders.

Buy the ASP D2 Heat and Test Twin Pak Insert for Metro Defender

One to practice with and one to carry is a sensible pairing. Order it from our Lubbock, Texas gun shop for fast shipping, and look through more pepper spray and OC products.