Green lasers use modules which consist of IR diode, and two kind of crystals, usually together with some optics. It must all be perfectly aligned. That's why it's usually not disassemblable (that word really exists !).
Most of the time, modding of lasers of any kind simply does not work. Laser is combination of battery, driver, module, optics and host .. all of which have to be tuned together. You replace one part, the rest will still hold it down, or will get damaged.
Anyway .. if you really feel like breaking it, the host looks really nice, it would be interesting to see how it looks inside. Maybe it uses some common green module, which could be replaced for let's say 200mW.