Mission First Tactical EXD Free Float M-LOK Rail System 15in Carbine Rail System Black. Streamlined and user-friendly the updated design allows shooters more time to send rounds down range and less time making field adjustments or modifications. In addition the upgraded upper receiver attachment system increases shooter stability and also minimizes the inner diameter providing a more streamlined appearance. Updated modern wall thickness addresses the flimsiness of other rail systems by providing the strength needed to attach a variety of M-Lock accessories. Specifications for Mission First Tactical EXD Free Float M-LOK Rail System: Manufacturer: Mission First Tactical Color: Black Fabric/Material: Metal Gun Make: AR Platform Gun Model: AR-15 Gun Type: Rifle Handguard Type: Free-Float Gas System Length: Carbine Length Mount Type: M-LOK Features of Mission First Tactical EXD Free Float M-LOK Rail System 7 sides of M-LOK Anti-rotation technology IR anti-reflective coating Steel non-timing barrel nut Ultra streamlined appearance Package Contents: Mission First Tactical EXD Free Float M-LOK Rail System Mission First Tactical TMEXD-MHG-15: EXD Free Float M-LOK Rail System 15in Carbine Rail System Black