Sick Green Laser Mod

hey im modding my green laser into a 100mw laser just need i thing how to get this top off any idea

And, how exactly are you planning on modding you green laser into a 100mW laser? And how powerful is it now?

Most likely any attempt to "mod" your laser will result in its untimely death. That said, to remove the cap just wrap the silver end cap with the aperture in it in soft cloth (to protect the finish), put it in a vise and rock the pointer back and forth until the cap comes loose. It will take some strength to work it loose, but it will come off.

How can I open this laser pen? :-/