IWC's SMCXL (Side Mount Cantilevered X-Long ) 1" Light MOUNT-N-SLOT's with AMBI mounting capability, so you can places the tail cap of the handheld light forward an extra .900" and in the perfect position to activate with your support hand thumb at either the 1:00 or 11:00 position on your weapon.
THORNTAIL KeyMod M3M61913 Offset Adaptive Light Mount is designed to accept Surefire M300/M600 Scout, Streamlight Rail Mount 1/2 & HL-X Weaponlights and Backbone Replacement M300/M600 Scout Bodies and other Replacement M300/M600 Scout Bodies and any 1913 rail mounted weapon lights (INFORCE APL, WML's, Surefire X300's, X400's, Streamlight TLR's) to a KEYMOD Compatible Forend, eliminating the need for separate bulky 1913 rail sections and a separate light mount.