I've owned a BattleAxe before and the laser started acting up shortly after using it. The FMA product works well and I haven't had any issues with the models that I've owned.
Be aware that the Green laser looks cool, but it can also give away your position (since it usually has a visible beam) and also can really shazaam up some peoples eyes.
EDIT: Just noticed this was an old post that someone had brought back from the dead.