This one seems to be good but its pricy. Any cheaper alternatives? Ive seen that Vortex makes a quality one. Also is it better to get the one for one eye or two? Preferably want something mil-spec in case SHTF
kestrelballistics.com

Terrapin X - 8 x 28 mm long range laser rangefinder - Kestrel Ballistics
Long-range laser rangefinder built by Vectronix and trusted by the best military and competitive long-range shooters in the world. LiNK compatible to send target information to the Kestrel for fast solutions engaging targets at extreme long range. This product only ships within the USA
