Any quality Lzdiode emitter with a 50 yard range {or more} seems to cost alot. These are some of the cheapest (http://www.laserglow.com/?wcw=google&gclid=CNbq5q-Pxo4CFSBMGgodN17Nwg) I've seen. (http://www.getphpbb.com/phpbb/images/smiles/rlp_smilie_178.gif)
That of course, doesn't include mounting hardware . . . (http://www.getphpbb.com/phpbb/images/smiles/a_doh.gif)