Google is your friend (part whatever)

I was commenting on a post below and suggested a google of "RATO packs". Being the curious george sort, I went ahead and took my own advice and lo and behold, lookie what I found:

(caption from 3rd photo down on the page)

Prowler just lifting off from STO launch using RATO pack with AeroTech™ M2500 motor and Aero Pack RA98 retainer.

The M2500 of which they speak is a popular Level 3 certification motor. That's right, we hobbty rocketeers get to play with military-grade propellants, or maybe it's the military that gets to play with consumer-grade rocketry motors.