amesbury Amesbury Active Upper Shootbolt Assembly P2000 Active Shootbolt Extension November 19, 2023 admin The middle Shootbolt Extension is used with Shootbolt tip to adjust the variations in door height. 20mm P2000 Active Upper Shootbolt Assembly, Doors 82- 95.5. Croppable: Yes, Shootbolt Teeth can be cut with hacksaw.