B&T MP7 model SD-984697-US SMG/PDW suppressor, cal. 4.6mm x 30 The MP7 suppressor was developed by B&T in close collaboration with Heckler and Koch, especially for the high-performance submachine gun MP7. It is the perfect choice for this weapon and has been successfully in service with countless MP7 users for many years. These are a great match for our Upcoming T7 pistols and are a direct fit. These are NFA items. We will need your Dealer’s FFL and SOT for the Form 3 transfer to them so you can start your Form 4.