Steambow AR-Series - Folding Stock Adapter Black 618. Specifications for Steambow AR-Series-folding stock adapter: Manufacturer: Steambow Color: Black Features of Steambow AR-Series-folding stock adapter This adapter allows you to fold up the butt-stock on your AR-Series Tactical crossbow Package Contents: Steambow AR-Series-folding stock adapter Steambow 0000753: AR-Series-folding stock adapter Black