VanIsle:
You wrote: "I just bought my first shotgun". Buying guns is something like buying computers, the FIRST thing you should do is sit down and write down exactly WHAT you want the gun for. If several things, put them in priority. Then go shopping for the gun that best fits your first priority, and see what can be done to the gun (accessories) to help with your second/third priorities.
NO one guns can be all things to all people and activities.
You wrote: "I want to build a tactical shotgun, is this a bad base to start one on?" Buying the Moss was not a bad base to start--buying the Moss with the rifled slug barrel is not consistant with the desire to build a tactical shotgun--I assume that by tactical you mean home defense. Rifled slug barrels and home defense do not compliment each other--as you now seem to have found.
My advice: start over, sell the one you have and purchase the gun that fits your purpose. My own solution to the needs of home defense was a Moss 500 with 20" bbl and max 8 shot capacity (although 8 is probably 3-4 too many) and a SureFire 623PA light on the end shooting 120 lumens of blinding light. Actually I paid as much for the light as I did the gun. Do not get all hotted up over shot capacity. This is a commom error of new guys-more, more, more shots is not the answer. It is far more important to shoot correctly and accurately that to blast a lot of shells. If you need 6-8 shots for home defense it just confirms that you have failed to learn to shoot a shotgun properly. Practice, practice, practice are the 3 most important words in shotgunning.
If you do see a down the road--or existing need--for the rifled slug barrel, you may want to see if you can simply buy the 20" barrel with the 8 shot capacity and just switch over when you bring the gun home from whatever you use the slug barrel for--just a thought.
Good luck and welcome to the world of shotgunning.
