Niniso Tactical Green Laser Sight 532nm with Picatinny Rail Mount Pack, BlackIt is a green laser with pressure switch designed to fit 1 inch rings (25.4mm exterior diameter).
These photos were taken just after sunset (exterior llumination 55 lux). In full daylight not so bright, of course.
From inside my garage to the shed, about 114 feet. Plenty bright. Even at a couple hundred yards if you knew where to look you could see it.
It's a very serious looking device, nicely finished in matte black, slightly spoiled by the words "ARMED FORCES LASER SIGHT MODULE." I am sure no military more serious than the Duchy of Grand Fenwick has adopted it. It might be used by the Unorganized Militia of American Liberation if things get that bad.