Smith and Wesson x frame revolver?

If the X-frame has rails, you can mount pretty much any laser sight on it, so long as the sight is rated for that much recoil. Not sure why you'd need a laser sight, though, since X-frame revolvers are usually used for hunting big game or defense from dangerous predators. For the former, a scope would be better. For the latter, iron sights would be best.

tricky task. lookup on to bing and yahoo. that could help!