That's going to depend. If the nickel plating was done on any official basis, such as creating a rifle for ceremonial guard duties, it could be worth several thousand Dollars. However, if the nickel plating was done aftermarket after the rifle was taken out of military service and released to the public, it's going to depreciate the value of the rifle considerably.
Around $1.50.
A little under $2.
About $2.
as of today silver prices approx 1.01usd
A 1943 S nickel is worth $1.25 in G-4, $1.50 In F-12, $4.00 in EF-40, $7.00 in MS-60.
Values for a circulated war nickel are $1.00-$2.50 depending on the grade
It is 35% silver and in circulated condition it is worth about $1.50 in melt.
That's a silver war nickel. On average, it's worth about $2, or upwards of $4 if uncirculated.
In 1943 half dollars were made of silver not gold. Yours is only gold plated. The value is still about $9 for the silver it contains. The gold plating does not add any value and in some cases can destroy any value you have.
Please check again and post a new question. Buffalo nickels were struck from 1913 to 1938. Any nickel dated 1943 would be a familiar Jefferson nickel.
1943 cents were made of zinc-plated steel. They don't contain any tin. Please see the Related Question for more information.
Please check the coin again and post a new, separate question. Indian Head nickels were struck from 1913 to 1938. A 1943 nickel would have the familiar image of Thomas Jefferson on it.