OK - WHEN was it issued? During WWII or Korea or when?
And at this point, still need an idea as to condition, using either NRA Modern firearms standard or percentage of original finish remaining. If it has been refinished (say polished and blued or nickeled), percentage of original finish is "zero" and vale is substantially reduced.
Assuming it is original, not rusted up, and unaltered, value range is probably c.$500 to somewhere (but not too far) north of $1000. Depends, as previously noted, on actual condition.