The Chonk of the REIN Micro is well worth it. Battery cannot compress/batter a spring due to the batteryjack, and the 1300 lumens and 50K+ lux is staggeringly superior to the 500 lumen M300C pictured on the left. The weight of the REIN Micro per my scale, with battery, is only 5.9oz. The improvement in ergonomics (tail cap), and massive jump in output as well as the battery retention (especially for a 12ga) far trumps the @2oz weight savings of other options.