Not likely to be silver. Only 5 silver 1946 Nickels known in existence which would make that thing worth hundreds of thousands or millions of dollars. You can take it to a coin store to get tested if you want to know for sure.
I noticed this was your very first post - so, Welcome Aboard Harley5150! You didn't list your state (or country) in your profile. So, you might consider jumping over to Sub-Forum: Select Your Area.... for information (i.e., clubs, hunts, finds, legends, maps, etc.) directly related to your state (or country).
Unfortunately, this coin can not be checked by weight. Both the standard cupronickel alloy and the copper-silver-manganese alloy of the war nickel result in a five gram coin. While the war nick tends to oxidize darker than the more common cousin, this is not always the case. If you have evidence it may be the wartime silver alloy, by all means please share, because the alloy can not be determined by pictures.
Not likely silver. Appears to have too much definition or any of the identifiers to be a Henning nickel. Weigh it........if it's more than 5 grams you may have something. And welcome to TNet.