The TMF scout is designed to get around the factory bayonet lug on the 18" barrel guns. By using a Surefire M600 and this version TMF" your light will not hit the bayonet lug.

Features:
CNC laser and machined processes offer high accuracy and quality
Only 5.5 oz including the light holder
Compatible only with the Surefire M600 series scout lights
Slots provide additional ventilation over the factory forearm as well as the ability to accept the Magpul M-Lok rail sections
Front end cap is a solid one piece mount providing 7/8" of clamping contact on your light and 3 points of contact bolting it to the forearm body
End cap gives a finished look and keeps dirt out of the front
Cerakote finish provides an insulating property over anodized aluminum
Remote tape switch can be run out the back and around to the side for convenient routing
Places the light bezel in front of the bayonet lug without interference