Well, the IRA uses for this pressure plate "mine" Baratol explosive...and they get by just buying it...or stealing it! But I'm not the IRA ...so I'll need to compose Baratol...meaning sodium azide and methanol! Well methanol, is just on the supermaket anywhere...AKI Store, at "diluentes area" ....but sodium azide...well...you take the car airbag...and extract it