In some, the recoil of the cartridge firing operates the action. In others, a small part of the expanding hot gasses that push the bullet are tapped to operate the action. The rifle extracts the fired cartridge, cocks the hammer, and chambers a fresh cartridge.
Semi automatic
Yes
Yes
Just fine.
The actual AK-47 and AKM are selective fire rifles, with both semi-automatic and full auto capabilities. There are several semi-auto clones of the AK series rifles manufactured for the civil market, paramilitary forces not authorised fully automatic weaponry, etc., but the only purpose built, semi-automatic true AK was the Romanian G model.
It depends on the gun and caliber but most semi-automatic rifles such as the Ruger .22 are legal to hunt with in California.
No, they must be be recocked after each shot.
no, they arent legal anywhere in the US.
No. Semiautomatic .22 rimfire rifles may be used for small game, but no semi rifles for deer. See link to Vermont hunting regs, and scroll down.
automatic rifles work by the exerting gas made from the bullet and the gas pushes back the bolt loading a new round in
Ruger has many variations of semi-automatic 22 rifles. Prices will vary from 100-1000 or more USD depending on specifics
Les Baer Custom S.R.P. Semi-Automatic Pistol