Air activated switch (BFA like)

For use with Gel Blasters or Airsoft

The idea is to use lasers to practice dry firing and increase your marksmanship with gel blasters or airsoft rifles.
This construct helps to easily fit a switch and small piston to a blaster that can be used activate a mounted laser.
The switch I used was a Micro Limit Switch Long Hinge Lever AC 125V 2A 3 Pin SPDT that I purchased in a packet of 40 for a very good price.
If the switch doesn't fit tightly enough use a glue (hot is good).
Center as much of the leaver of the switch as you can.
BFA_Inner sits in the muzzle and holds the piston (a plastic straw and a 4mm standoff) and easily interacts with the switch.
If need to stop the device from being shot across the room there is a printed circlip that can be used to lock it in place over the muzzle.
Wiring requires that you modify the 'rats tail' of the laser sight using connectors of your choice so that you can still easily move your laser or 'BFA' between blasters.

If you require so