Used on the range twice. Love this set up on my 300blk but I'm going to switch to an EOtech. 
Romeo7s takes AAA battery and you can switch it out without taking it off your gun which is super convenient, 7 brightness settings and 2 NV settings too

Tacticon Apex Falcon V0.5 3x magnifier works a treat, quick detatch, easy access knobs for quick clarity adjustment. 

Text if you have any questions. Thanks