While trying to decipher the poor assembly instructions for my brand new Benelli Legacy, I finally gave up and decided to try assembling by instinct. A circular piece of plastic came flying out of the firearm while trying to fit the barrel. I am Scared to use this firearm as I do not know where the cheap piece of plastic goes and fear it is an important safety issue. Please help me assemble this firearm. Any ideas what the plastic piece is or where it goes? Moreover, can someone succinctly explain the assembly directions for this firearm. The manual is atrocious!