Unity Tactical M-LOK Compatible FUSION Adapter Black FUS-MFA W/ Unity Tactical Fixed Front Sight Black FUS-S2B. 1oz) accessory mounting system for M-LOK rails. NOTE: While the adapter is designed to be used on M-LOK rails to create the most minimal mounting system possible it does not utilize standard quick attach M-LOK hardware and requires backside access to the rail to install. All hardware necessary to mount Surefire Scout lights and FUSION accessories is included. Package Contents: Unity Tactical M-LOK Compatible FUSION Adapter