Why are gun (Specifically handgun) lasers so expensive?

[Johhny B. Goode]

A basic laser is about five dollars.
You stick it on a gun and suddenly it's 350.

WHAT?
Did I miss something?
LoVexx Y ... SERIOUSLY? Guns are dangerous? OMG I have to tell the president! This is terrible news!

 

[LoVexx Y]

uhmm why do you care guns are dangerous lol

no but seriously they are

 

[eddieroachr]

another got have gadget shoot free,, your batteries last longer ok

 

[LoVexx Y]

uhmm why do you care guns are dangerous lol

no but seriously they are