Ask a hundred torchies what a "tactical" torch is and you'll get a hundred answers. IMHO at a minimum they should have a tail-switch capable of turning on at full power; a beam capable of identifying targets at 100 metres or more; a compact size so they can be carried easily and held in a variety of hand positions; and a very robust and waterproof design to work reliably in all conditions.
Although the ability to mount the torch to a weapon is not usually considered essential for a tactical torch, all of the models below can be fitted to a rifle, and all but one are available with "remote pressure switches" so they can be operated from the fore-stock. And they all offer a range of brightness levels including "moonlight mode" to move about without being conspicuous or impairing your night vision, and a tactical strobe (see here to read about the Dutch police experience with strobes).
Please click on the pictures below for details, and contact me so we can discuss discounts.