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.
It depends on the gun and caliber but most semi-automatic rifles such as the Ruger .22 are legal to hunt with in California.
The most common hunting firearm, today, is the bolt action rifle in a suitable caliber and of sufficient power to humanely harvest the targeted animal. Also used would be: single shot rifles, pump action and lever action rifles, in some areas semi-automatic rifles, powerful handguns and bows/crossbows and arrows/bolts.
The H&K USC is a semi-automatic firearm that comes only with a ten-round magazine. The ten-round magazine may not be legal in some states for hunting. Since there is no alternative for a magazine with lesser capacity, you're limited to using it as a single shot rifle. Some states may not allow semi-automatic rifles for hunting. Some states may not allow rifles of any caliber for hunting, in some or all counties. The guiding rule, of course, is to read your state's hunting regulations and laws carefully, and be guided accordingly.
automatic rifles work by the exerting gas made from the bullet and the gas pushes back the bolt loading a new round in
Shotguns and rifles
Yes
Embellishment
Yes
Yes
Yes