Weapon statistics are currently valid only as of 188.8.131.52 from Early Access. The way weapon data is processed has been changed from this build forward, and as such, any statistical changes can only be surmised through testing and guesswork. Accordingly, this data should be treated as valid unless superseded by evidence to the contrary.
From PLAYERUNKNOWN'S BATTLEGROUNDS Wiki
There is a variety of Equipment in PLAYERUNKNOWN'S BATTLEGROUNDS, varying from protective gear to various utilities used to aid players throughout the game.