Quote Originally Posted by snakedoctor View Post
but can you still remove the piston cap and piston rod and spring for cleaning with the M4 2000 flash hider installed and no can on?
Put some tape on a pair of needle nose pliers, pull the piston slightly rearward from inside the upper receiver, and then you can jiggle the plug out past the flash hider. The piston will slide out with no interference.