We do not have a model 304. If you mean model S04 which is the current model spotlight then the answer is maybe. This was the original cap & toggle used on model S04 lights. Depending on when it was made this is correct. If the light was made recently (past 2 years) Then it may be U-8596 Cap and U-8597-A Toggle.
Easiest way to tell them apart is the hole for the toggle is a circle on U-6002-A1 and it is a square on U-8596.