For a legal self-defense weapon that you can easily conceal and carry, this particular device is top tier, it's really only two great less than lethal weapons, the Gavle is the best 68 caliber launcher because of its extreme power and size, no other launcher comes close to matching its power without being modified, this weapon is on a whole different level, although you only have 4 shots those well placed shots can cover a large area where it can take down many, it's not ran off CO2, it has its own firing mechanism that's very reliable and you can easily reload by changing the mag instantly, the velocity of spray is very powerful and the pepper spray takes affect immediately, you should be in complete control in a matter of seconds what you decide to do after that is totally up to you, although this particular weapon is very reliable, always carry some form of back up just in case one decides to fail, if they both fail in the same ordeal, God is truly on their side, this weapon is not silent like other sprays, it's a loud like a 22 pistol and that's a good thing because your attackers will be in total confusion in what you got, I actually own over 12 different less lethal weapons and this by far is the best pepper spray gun available, this and the Grimberg Gavel is all you need and I highly recommend them both.