For More Then A Few Year's As A Young lad, I As A Young Weapons Tech, Worked On The Canadian 9mm SMG, The Same UK SterlingJust With Some Canadian Change's To Some Part's. Yes Other's May Not, But I Still Say I would Be Just As Happy With That SMG as say A MP5...But I Am Old! So When You Say You Have At Least A "Deactivated" Sterling To Convert, I Just Cry! So This E11 Is Not Just A All One Piece Blob Of Plastic, But is Made With Parts Cast Then Fixed Together?