I thought that the BFA were now designed to "catch" rounds, perhaps the LSW version is designed to "catch" several rounds rather than an individual round as the LSW is more likely to be firing on auto.
Polar - Yes you are correct, the A2 bfa does indeed have a 'bullet catcher'. Designed to prevent the bullet escaping in the event that a live round is fired. LSW bfa is tested to higher standards for the LSW muzzle velocity. Supposed to be able to take 5 live rounds, but i`m not going to test it!! Admittedly this shouldn`t be possible with the blank magazines.
Kaye - Wait until you understand basic ballistics before you try being a smart arrse!!