Just wanted to give credit where it is due. A few weeks ago I attempted to remove the recoil spring (finally) from my M4, only to find it would not come out. The threaded plug was stuck in there somehow. Trying to be gentle got me nowhere. I didn't want to take a chance on stripping the threads out of the recoil tube, so I called Benelli. They said to send it to them and they will check it out.
A couple weeks later (thanks to Hurricane Sandy), I got a call from one of the gunsmiths. He asked a couple questions, and then had it fixed that afternoon and sent the frame back. I now have my M4 receiver back and it is better than new (literally).
Love Benelli! Way to go guys.