Our take on the ranking
Short answer: if you want the distance and the heat picture in one device, buy the Nocpix Vista H35R ($3,300): a 640 sensor rated ≤15 mK, a 1,200 yd laser and a 5-year warranty. The Pulsar Axion 2 LRF XG35 ($2,999.97) is the light pocket option at 350 g, and the Pulsar Telos LRF XP50 ($3,699.97) the long-range one with its 50 mm lens. On a tighter budget, the AGM ReachIR LRF 25-384 ($1,895) keeps the laser and a 5-year warranty.
A rangefinder turns a thermal from "something is out there" into "a hog at 212 yards". All four models here put the laser in the same body as the thermal core, so one button gives you the distance to the animal you are looking at.
With the laser a given, the choice comes down to reach, sensor, battery, weight and price. The three 640 models are neck and neck; the ReachIR trades a 384 sensor and a short battery for a price $1,100 lower.
Pulsar and AGM state 1,000 m with ±1 m accuracy for their lasers; Nocpix lists 1,200 yd on its US page. Ranging a warm animal at night works best on a broad side and a steady hand.
Scope: thermal monoculars with a built-in laser rangefinder (LRF), ranked on everything else that matters once the LRF is a given. Scores on this page use the rangefinder score weights (reach (lens / pixel pitch) 25%, sensor resolution 20%, thermal sensitivity (netd) 10%, battery life 10%, weight (with battery) 10%, price 10%, display resolution 5%, water protection 5%, warranty 5%); each review shows the overall score.