Arisaka Finger Stop M-Lok FDE

Unlike a hand stop, which most people position at the rear of their support hand, the Finger Stop has a rounded profile which is ergonomically designed to be located between your index and middle fingers. This typically places it further forward on the handguard, which also means it doesn't get in the way when transitioning to kneeling or prone shooting positions, where most people move their support hand towards the rear.