Who in their right mind carries a pepper spray gun for self-defense? Probably someone who doesn’t know any better is the only person I can think of.
Carrying a facsimile firearm has all the risks of presenting a firearm without any means to put down a threat. And if it looks like a gun, you can bet both cops and crooks are going to treat it as such. As in “don’t bring a pepper spray gun to a gun/knife fight.”
Back to that non-gun gun. I know of people who have taken a healthy, direct hosing of pepper foam into the eyes and then fought on for a minute plus before dialing 9-1-1 on their phone. Even average people without a lot of motivation can function for fifteen to thirty seconds. So really, how much “stopping power” will pepper spray have against a determined adversary?
Sure, some will say, “it beats nothing at all!” I’m not in that camp. Are you? Discuss.
Lastly, Juan: Thank you for putting your gear up for criticism, sir. My advice as a long-time firearms and personal defense instructor: seek out some hand-to-hand training to substitute for that pepper spray gun. Perhaps some Krav Maga from a reputable and experienced trainer. That will serve you far better than a non-gun pepper spray gun.