Crimson trace offers lasers that can be fitted to most weapons from pistols to shotguns. Crimson trace lasers offers a product what they call instinctive activation which in short means that as soon as you hold your gun when your hand touches the grip the laser will come on.
No
The Crimson Carry line of pistols are equipped wit laser grips by Crimson Trace.
100-800 USD or so
Insight and Crimson Trace come to mind.
crimson trace grips for smith and wesson 39
Well, neither one is particularly great, but, personally, I'd take the Ruger over the Kel-Tec anyday. As for the Crimson Trace laser.. couldn't tell you. It's really a useless accessory.
There are laser sights for almost any handun. Try Crimson Trace.
100-500 USD or so
0-500 usd
Neither. "Better" depends on what you think, not someone else.
Trace fossils
Check out Eotech. The military uses them. They are a halo sight but you don't need a laser on a AR anyway.