You could of course 'liberate' an old Laser hull (asking first), no doubt to be found abandoned in the corner of 90% of sailing club boat parks, and cut down to size; Also to be found regularly on eBay for 99p. Unsurprisingly this will replicate the exact hiking position of a Laser.
I was once a flashaholic and addicted in laser beam now.
So I have collected and made a lot of flashlights.
I started making my laser DIY and mod, these days.
One day I'd like to make P60 style drop-in laser module.
P60 is a well-known flashlight module and its size is standardized. There...
Look on eBay for some 303 532nm lasers. They can be had for ~$8.00 and put out ~80 mW of power. It is pretty bright. You can see the beam in dimly lit rooms quite easily. For that price, you can pick up a few from different sellers and see which you like the best. They run on a single 18650...