I wondered about gun sighting systems. I have been a hunter since I was about 8, but I have only dabbled with any types of special optics, never felt the need to own anything beyond a good optical scope (outside of military service anyway).
So maybe there are some high power laser sights out there, or maybe a smart astronomer could create one with a simple telescope, but you still need to track, and depending on how far away and what aspect you are tracking from, staying focused on a cockpit window seems to me small challenge at least.
I am still curious how the beam was detected. Do commercial planes have detectors in the cockpit now, or did someone get blinded?
My laser is just to sight the scope in. It fits in the bore so it can't be used with a live round.
Tracking an object that far away at that speed is unlikey to have been done by hand held device.