Thanks to the extended design, it rests on a larger surface on the scope, thereby fixing the stock more stably. The Smartclip AL adapter is specially designed for attaching night vision and thermal camera adapters to optical scopes. The precise manufacturing process guarantees optimal attachment of the adapter to the scope. The fixing tab, which can be closed on the side, ensures that the adapter does not slide on the scope tube. Features: Made of extremely stable aerospace aluminum With a particularly quiet strap for mounting in the woods Rounded edges for easy installation Thanks to the side lock, it is easy to notice if the adapter is not properly fixed Required distance from the rifle: min 3 mm Available sizes: 30 mm, 36 mm, 40mm, 48mm, 49mm, 50mm, 52mm, 54mm, 56mm, 57mm, 58mm, 59mm, 60mm, 62mm, 63.5mm, 64mm, 65mm (scope outer The following clickable table can help you choose the diameter: Adapter / stirrup dimensions according to scope types Important: In order to connect this adapter to the Pulsar Core or Krypton, you need the Smartclip PMC52 adapter for the Core (article no. : SC00100) or the Smartclip Converter PK52 / 351 for Krypton (article number: SC00101). The FN455 Forward can be connected to this AS adapter with the PF4 converter (SC00103).