This is the Ruger 10/22 rifle. Five million of these have been made since 1964 in a variety of modifications. They are all basically the same gun. It is made in .22 LR caliber. Is this one of the guns you anti-gun people want to ban? It is semi-automatic. The one I used to own had a heavy barrel and a scope.
This gun
is the Keltec SU 22. Bad assed looking, right? An "assault weapon?" No. It is a semi-automatic .22 LR rifle just like the Ruger 10/22. I prefer a 10 or 15 round magazine with this rifle rather than the one shown. This one just gets in the way. The rifle itself is really no different than the 10/22.
https://en.wikipedia.org/wiki/Ruger_10/22
https://www.guns.com/reviews/kel-tec-su-22/