SureFire teased us today with some shots of their upcoming XM style tailcap for their Scout series weapon lights (M300/M600) later this summer. The XM series tailcap/tape switch was a popular way to run SureFire's legacy Millennium and Classic weapon lights, giving the shooter the ability to turn the light on and off or lock it out from the tailcap while having the use of a remote pressure pad for momentary switching.
There are a few reasons to run an XM, the most obvious is as a backup to a lone tape switch. Those pressure pad cables fit tight and it's rare to have one pull out unintentionally, but it could happen. The XM will let you continue to use the light without a pressure switch.
SureFire hasn't told us if the new switches will offer the same functions as the original XM switches, but the only question is whether there will be a convenient lockout feature. We hope there is. The dual switch will ship later this summer and we will update you with a price as soon as SureFire releases one.