Mounted to Guppy-converted fleet boats (Tunny, Barbero) and bespoke Regulus diesel and nuke boats (Grayback, Growler, Halibut), the Regulus cruise missile was the first submarine deployment of the Nuclear Triad. With a 500 mile range, the Regulus wasn't much more sophisticated than the German's V1, but for the 2 megaton yield nuclear warhead.
4 x SSM-N-8 Regulus missiles.
Here are my general instructions for working with Fine Detail Plastic.