Bc_k its possible to do. You can order the adaptor from overseas if you can find it in stock i believe kic bb gun carries them. You can make a silencer work on it however. You have to unscre the front sight which leave two little holes in the barrel. Make a silencer from pvc or what have you. Then make it so you can put two small screws through it to go into the outer barrel. The mk1 is utterly useless unless you get a metal hopup. the plastic one on it breaks easy, isnt sealed well and is an all around piece of crap.
www.evike.com has a newer hopup its not metal but its worth a try. The barrel is a bit tricky and requires some machining knowledge. It doesnt have a standard hopup so you would have to modify a barrel to work and then dremel out the inside of the gun to allow the extra mm to fit.