Qd Adapter manufacturer / supplier in China, offering Quick Twist Activation Fit From. 177 to. 78 Cal. Boresighter Collimator Rechargeable Green DOT Laser Bore Sight for Rifles, Quick Twist Activation Fit From. 177 to. 78 Cal. Boresighter Collimator Rechargeable Red DOT Laser Bore Sight for Rifles, Quick Twist Activation Fit From. 177 to. 78 Cal. Boresighter Collimator Kit Laser Green DOT Bore Sight for Rifles and so on.