Yep, most regs will fit whatever gun you put them on with the exception of the kingman regs and the defiant reg, which can be replaced with the use of an adapter. But yes the shocker reg will fit on an ego. Dont know why you would though.
Back to Rockin The Dark Shocker
For the most part, but Angels have always had different reg types. In the day you had to get a new attachment because the regs used Euro threading, now you have to get it because they mount directly to the frame.