Trigger for the Labradar unit that will trigger off of recoil. Will work on anything from a 22LR to a suppressed system or with standard rifle and brake. Unit comes with velcro to attach to the rifle.
The trigger is very sensitive and some false readings may occur with hard bolt manipulation or dropping the BCG. Usually, these show as an error reading with no velocity recorded.
Picatinny mount for the unit sold separately.