Hopefully we saw these types of silhouettes only in designs, on posters or in advertising and never in real life.
But unfortunately it is not like that and many times we have to use them for our projects.
Here you have a Pack of 30 silhouettes for Photoshop of weapons: pistols, shotguns, submachine guns, grenades, sawed-off shotguns, weapons company logos, etc....
Download | 30 weapon silhouettes for Photoshop
Source | DeviantArt