The minimalist half-slot M-LOK Index Stop is a small hand stop primarily for the index finger, serving as a reference point that maximizes protection, comfort, and grip for the support hand while reducing the risk of muzzling. The Index Stop has a ridged texture on the front and rear surfaces and is built to the same dimensions (1/8" protrusion from the rail surface) as Magpul Type 2 M-LOK Rail Covers for seamless integration. It is molded from Magpul's proprietary polymer.