This is a used but perfect Surefire tapeswitch that was issued with a M951 weaponlight. It will fit the XM and UM tailcaps from what I understand, and will work on the millennium series of lights. It may work on others but you will have to verify for yourself.
Included is a OD green plastic holder for attaching to a rail. The switch can easily be removed from this mount if you have other plans. It's cleaner and nicer looking than the picture might lead you to believe.
$40 shipped NOW $25 O.B.O. shipped
. Accepting discrete paypal or USPS money order.