The basic Scout Marine has a choice of four different weapons, Boltgun, Shotgun, Combat Blade, and the Sniper Rifle. Each one has its own plus and minus.
Today I am going to take a look at the Combat Blade, and the Shotgun. Right now those are the two weapon layouts that I have really grown to like. In the Scouts basic wargear they come with a standard boltpistol so with the combat blade and boltpistol each scout has two attacks in close combat, and only a 12" firing range. The shotgun however has a the same 12" range but can fire twice, but the shotgun has no AP value so who ever you are firing into will get an armor save. So with a 10 man squad outfitted with half Combat Blades and Half Shotgus. It gives the squad a total of 15 shots at 12" all of which are strenght 4, 5 with an AP 5, and the other 10 with No AP.
So what I like to do with that type of squad is to use them as a shortrange close combat unit get them as close to an enemy unit as possable and on my turn move them 6" and hope that I can assault in the same turn. So that I get 15 shots before the assault, and a total of 26 attacks on the assault. It is a cheap option and one of many different tatics that can be used with Scouts.
This is just one of the different weapon layouts for the Scouts.