Labradar Air Gun Trigger Adapter, Chronograph Accessory The LabRadar Air Gun Trigger Adapter works with the company's Doppler Chronograph by modifying the system's setup in order to accurately record air-pellet velocities. The system comes set up to trigger through muzzle blast, which is non-existent on air guns. The LabRadar Air Gun Trigger Adapter is also a valuable tool for use with rimfire calibers and suppressor-equipped firearms that may produce insignificant muzzle blasts. Features: - Designed for use with LabRadar Doppler Chronograph only - Modifies trigger for chronograph use - Designed for use with pneumatic guns Specifications: - Style: Chronograph Accessory - Item Height (Inches): 4.000 - Item Length (Inches): 4.000 - Item Width (Inches): 2.000 - Item Weight (lbs): 0.500