Hobbies

Shooting is a hobby as much as golf is a hobby. Telling me I can only own X amount of guns is like telling a golfer he can only go golfing with X amount of clubs. Guns and clubs are for different situations and distances. Rifles for longer range & bigger game, much like a driver. Shotguns for birds and closer range game, like a iron/wedge. Handguns for short range, like a putter. 

Do golfers buy balls 3 at a time, no, you buy a case. Do you buy 1 roll of toiler paper at a time or a 10 pack at Costco. Same with ammo, a good day at the range involves several 100 rounds, rounds like anything else are cheaper by the case, not to mention I loose "ball" on every shot. 

Not only that, you have people that like to collect historic guns, like an 1890's Winchester, or WWII M1. Many will rarely be fired and mostly displayed because of their value, much like a classic car. They are not being used by criminals.

For the people who grew up playing call of duty or medal of honor games, tactical weapons are their thing, .223 AR's infinitely customizable, extremely accurate. Much like your avg wannabe high school kid with a riced out civic. Cars btw, kill more people in this country than guns. 

Limiting legal & properly permitted gun ownership is not going to stop criminal gun activity. Though maybe the gov't not selling assault rifles to cartels might help.