I recently bought this light from another CPF member who had it custom built by Peak. Something just came up (split decision to take a family vacation) and I need the funds so I am reluctantly putting it up for sale. This is a very nice light, about as solid as they come. Stainless steel, head is sealed. I don't know why these aren't more popular. It takes 2 CR123s, 2 RCR123, 1 18650, and others, I believe (see original post linked below). Other Peak LEO series bodies fit on the head, too, so you can run it on AAs if you want with the AA bodies. The adjustment knob is very smooth, taking the light from a glow that you can hardly see all the way up to 600 lumens. It's got a neutral XML emitter and optic to improve the throw. The light is in excellent condition, minty. Included is an extra Judco tail switch and a brass tail piece which, if combined with a brass or stainless temporary switch from Peak (not included) gives you another switch option. With the Judco switch that is installed, you press gently for momentary, click for on, and use the adjustment knob to control brightness (whether in temporary mode or fully on). Below is the link to the original sales thread with pictures. The light as I have it is in the same condition. I kept it stored in a box and take it out several times a week for my night walks. It will ship loaded with 2 Surefire CR123 batteries that have plenty of life left, as I hardly used the light on high.