Swiss Arms Airsoft Chronograph

An essential part of any Airsoft enthusiast's inventory, a chronograph is a helpful tool to allow you to measure the velocity and rate of fire of your Airsoft gun to make sure it performs as it should. The Swiss Arms Airsoft Chronograph is a simple to use unit powered by common and cheap 4x AAA batteries, with pre-programmed BB weight settings to calculate muzzle energy, and an internal memory to store your results on the unit itself.