The laser takes up 2 MLOK slots.
Yes! I purchased to confirm it does fit on the Ruger PC Charger 9mm takedown bottom slots. It sticks out 1/2" past the barrel stock. I plan to shave off the center tab to slide it back to almost flush.
The unit is 3.3" (84mm) long, an extends below the rail 1.25" (30mm).
This item is 3.3" long (83 mm) and protrudes down below the rail 1.25" (30mm).