You are welcome to substitude other accessories but we recommend using the accessories offered here.
The rifle scope mounted on some photos of the Signal Sensor can be purchased for $100.
ORDER PAGE
Click HERE to order Action Sensor.
Click HERE to order Tripod.
Click HERE to order Clamps.
Significant experience and testing various substitudes confirmed that these accessories work the best.
Generally the rifle scope is no longer needed after we made some technical improvements.