They are real in the sense that you can hold them in your hand. But they are not money. And if you tired to spend one you might get arrested. The FBI and Secret Service just raided the place that makes them and confiscated everything they had.
If you mean a Liberty Walking half dollar, of course you can - it is a legal tender coin manufactured at the US mints in Philadelphia, Denver and San Francisco by the billions. Of course since their bullion value is around $4, you would be an idiot to actually spend them!
the 'Liberty Dollars' and the US minted 'Walking Liberty Dollars' are 2 totaly different coins. the first is NOT legal tender, while the 2nd is!
LOL, when you say that if you tried to spend it, you would get arrested, I am reminded of a story from when I was little. My buddy spent a replica of a ST Gaudens at the corner store. The corner store is Indian run and the guy working there looked it over, read where it said $20 and United States of America and then tried to put it in the draw. He had no problem taking it, the only prob he did have was putting it in the draw, the thing was about 5 inches across. Anyhow, the owner of the store thought it was funny. He got a good laugh out of it and told my buddy, "you owe me $20". They guy that was working at the time and accepted the $20 coin was the owners father in law.
"Walking Liberties" are 50¢ coins minted for circulation from 1916-47, in .900 coin silver. Their bullion value is currently about $4. The .999 fine 1 oz. silver bullion (NCLT) coins minted since 1986 with an obverse that is a replica of the Walking Liberty halves are generally referred to as "American Silver Eagles", not as "Walking Liberty Dollars". They have a nominal face value of $1, but their bullion value is about $14 at current market prices.