Warrior X Pro here, but no Modlite use. Lots of rounds on it, but no exact count - still ticking sitting next to a Can 100%. The Head may be bigger, it's 40mm IIRC, the OWL is 37mm, no idea on Modlite. IIRC they quote 9x,000 Candela, but that German guy M4D M4X got over 100,000 in a Lumen Tube. It's a 21700, so it runs forever, but it's a proprietary battery, so get a spare sometime. I use a GG&G 1913 Mount, no idea for MLOK - It's a smidge bigger than 1" diameter, so you may need to play around with mounts. You *do* need to wrap the pressure switch magnetic cap with electrical tape or it *will* move (aka no light) - but 2 wraps and it's a nothing burger. Quick tap is constant, pres and hold is momentary. Turbo only with the switch. 1/4 turn of the tail cap locks it out, no light ADs. It's a warmer light - I prefer the color temp of my Acebeam L16 better (super blue/cold), but the OL WXP is a beast.