Just got my tactition in the mail. Comes with four batteries, two in the light and two in the packaging. The lanyard is smaller and different than any surefire lanyard I have ever seen before. It is not stretchy, or "shock" cord as James Yeager advocates the use of.
A Keeppower 16650 fits and works fine.
The lanyard ring is a single piece of blackened steel. It looks like they just sllipped it onto the tailcap, without the use of special tools. You could probably finagle it off without having to resort to cutting it off.
A E1D clicky tailcap fits but does not work. A Scout M600 ultra clicky tailcap fits but does not work.
The E2L clicky tailcap fits and works perfect. Click on, click off.
The old style two way clips will not fit. The new clip is wider, and thus, the skinnier older style will not fit into the slot.
The KX2-A and KX2-B head from an E2L fits and works fine on the Tactician.
The KL4 head from a L4 Lumamax fits and works fine on the Tactician.
The E2L 500 lumen head fits and works fine on the Tactitian body.
The 200 lumen LX2 head fits and works fine on the Tactician.
The Tactician head, mounted on a LX2 body, gives you three output levels. Screw the head down tight, press the tailcap lightly and you get medium output, perhaps 100 lumens. Press harder, and you get high, 800 lumens. Unscrew the head slightly and you get low, about 10 lumens. When the head is unscrewed lightly, you only get low, no matter if you press hard or light on the tailcap.
The Tactician head fits and works fine on a Surefire M600 scout ultra.
The tactician head fits on the E2L body and works perfect as designed. Tighten the head all the way, full brightness. Loosen the head slightly, comes on low 5 lumens.
The E2L body is almost identical to the Tactician body. Only real difference being the clip size.
The Surefire packaging is an inch longer than the USPS priority mail box that Tactical Response used. So they had to fold the packaging to make it fit. Not a big complaint, and I understand why they did it, but most companies probably would probably try to find better shipping boxes so as to not damage the packaging.
I have a feeling that the clicky lovers are going to love this light by simply adding the E2L clicky cap.
The tactician low does look brighter than 5 lumens to me. Id guestimate 15 lumens. But I have no equipment to verify.