The Gray Ops CNC Athlon Optics Rangecraft Velocity Pro Bump Cover is the only way to protect your Athlon Chronograph. FeaturesMade from a strong, flexible plastic to withstand all of the punishment a trip in your pack will deliver.Easy slip on design with a removable front cover.While the front cover is closed the screen and all buttons are protected.Easy access to the charging port without removing the Bump CoverBump Cover can stay on the Athlon while in use and will not affect accuracy or reliability.This was tested across centerfire rifle, pistol, rimfire, air rifle, and a bow with no differences recorded.Compatible with the Gray Ops Athlon Mount and Mount Kits.