stack .45 ACP 1911 pistol (evidenced by the magazine at  the bottom of the weapon). A few seconds later, when the children  are lined up, the gun becomes a Beretta with a standard barrel. A  few seconds later, when the silencer is attached, the gun magically  has an extended threaded barrel (to allow attachment of the  silencer). The silencer that was used obviously screwed on, which  would not attach to a standard factory barrel.