Only three companies I know of make a 416. SRC, VFC, and JG. If there are no markings, it is probably a JG. If it is a stock gun internally, see what the motor looks like.
JGs come with black gearbox shells. I believe SRC only made a Gen 3 416, there are no Gen 2s, so it should have a blue cylinder and 8mm bearings.
VFCs have a normal colored gearbox shell and I believe the cylinder is chrome. I think they have bearings, but not positive.