Of all the things you need to evaluate in an AR-15 weapon-mounted light, it’s unlikely that waterproofing is at the top of your list even if you recognize its potential. Outer durability, coatings, lumen and candela ratings, mounting options, and operability are likely to eat...

Everyone recognizes the Picatinny rail, also known as the MIL-STD-1913 Rail that was developed in the 1990s and named after Picatinny Arsenal in New Jersey. It’s been a popular mounting system interface for many years and compatible with a huge range of shooting accessories....