Arisaka Defense Offset Adapter, For Surefire M620 Light, Anodized Finish, Black M620A The Arisaka Offset M620 Adapter is used to attach Surefire M620, M951/952/962 series lights to the Arisaka Offset Scout Mount and Side Scout Mount. The recessed design maintains a low profile. Lateral positions are still available while using the M620 Adapter, which allows you to shift the light closer or further away from the top Picatinny rail for clearance around front sights or other top rail mounted accessories when used with the Offset Scout Mount.