Ballista BAT Reverse L-Buttstock Upgrade Kit Extendable. Ballista extendable L-stock is designed to improve your shooting game. Elevate your crossbow shooting skills with this stock. It comes equipped with a special trigger system ensuring the accuracy and effectiveness of each shot. Feel the difference in precision and control with this exclusive upgrade. Specifications for Ballista BAT Reverse L-Buttstock Upgrade Kit: Manufacturer: Ballista Color: Black Weight: 1.4 lb Fabric/Material: Aluminum Finish: Gloss Features of Ballista BAT Reverse L-Buttstock Upgrade Kit Compatible with BALLISTA BAT Reverse Not Compatible with BALLISTA BAT Package Contents: Ballista BAT Reverse L-Buttstock Upgrade Kit Special Trigger System Ballista BAL-AC-14: BAT Reverse L-Buttstock Upgrade Kit Extendable