M1A1- type Pressure Firing Device

This is a perimeter alarm based on the M1A1 pressure firing device originally used by NATO forces to do a hell of a lot more than just signal an intrusion. As this device currently stands, it can only initiate shotshell primers, in this way producing a loud report that will denounce the presence of the person/beast that unwittingly initiated it. Check your local laws before downloading these files or printing these devices. LBRY Tags: 3d printing; fosscad; perimeter alarm