Talk:MP5SD6/@comment-4942871-20120821164126/@comment-12.233.146.130-20120821230931

The MP5SD series IRL has an integrated suppressor that dissipates the propellant gasses so that the bullet travels at subsonic speeds. In addition to eliminating the sonic crack of the bullet, it drastically reduces muzzle sounds. You don't get that just by attaching a removable suppressor to an MP5Ax. It's perfectly sound to call the SD series the "cousin" of the A series MP5s.