Do you mean that I can have a Semi Automatic Rifle at 18, but have to reach 21 for a Handgun.
yes, it's always been that way. Contrary to popular belief, the vast majority of murders and other crimes are committed with handguns, since they're concealable and easy to carry. It's only the rare occasion that a nutter kills people with a rifle, but it makes the news because of the number of victims.
It's what frustrates me about the gun control debate... It takes way more nuance than most people have the patience for.
I hear that handguns are used in way more crimes as an excuse to ignore mass shootings with semi autos (you are NOT doing that, I'm just saying I see people do that all the time.) It's treated like a checkmate, can't focus on more than one thing at a time.
On the other hand, you have many many people that, no offense, are completely and utterly uneducated about the basics of guns. While I get it, they don't care about the technical specs, they just want the shootings to stop, unfortunately you need to be somewhat educated on the bare basics or else you look like a fool and fight for completely ineffective measures (most "assault weapons" bans fall in this category.) You can have a highly deadly weapon but no bayonet lug! Can't have pistol grips on rifles, that'll do a lot of good
When you get down to it, it becomes a debate on limiting/banning semi autos. That is the common denominator in all the scary guns they indirectly target. But that is a tough sell for a lot of people, not just gun nuts. Sugar coat it all you want, semi autos is what would need to be targeted
Continuing my rant no one cares about, ammo limitations are also very annoying, arguments I've had on this site. "Who needs thousands of rounds?" Good question, but look at mass shootings, they're not carting around thousands of rounds, they're carrying several dozen, maybe like two hundred at most. Good luck limiting ammo sales to like 50 and keeping track of how much someone still has... as if 50 isn't enough to do a lot of damage. Oh, the answer to the question of who needs thousands? Someone that wants to save money (bulk is cheaper, duh) and/or someone that doesn't want to place an order after every time you go to the range.
tl;dr Nuance, education on the matter, and not throwing out every out of context or misleading meme stat you found on the internet... That is what is needed in the gun control debate. Yeah right, good luck with that