I think the nite finder mod is best because its an easy, yet very effective mod but also some pump mods can leave a mark.
Also, i dont want to go spend money on guns and break the gun in the modding procces, What do you guys think is the best mod for a beginner and the best mod overall.
I tried modifiing my maverick as one of my first mods(bad idea) it ended up being even more pitiful than when i started.

PINEY EDIT:I'm changing the name of your topic and heading, to save your ass from excess flames. What ompa said, stands. Ease up on any "best" topics.