So to answer some of the questions raised, -rest I know that the one on the left is a dynatex scaremonger - I have owned that for years and know exactly how it works. For the benefit of @Tommikkaand his helpful images, they both take 9mm blanks placed in the screw in top (vented section) the left one is set by pulling the plunger outwards and pushing in on the central pin that passes through the plunger to lock the firing pin in the primed position (which has the effect of priming a spring loaded firing pin) the central rod going through the plunger can be very easily pulled out and this action releases the firing pin to fire the blank.
fishing line (normally) is then tied to both half’s via the rings, and secured to a fixed point with the line crossing a trail or doorway, contact with the line pulls the in and bang ‼️ grenade kills for all those with whatever blast range your site sets (10m in my case)
it’s the one on the right I am interested in identifying, it appears to work on the same principle, but I cannot see how to prime it, if I can identify it I can find out if parts are missing or broken off, such as the plunger shaped priming device. For those asking for different angles there is nothing else to see, it’s a plain blue metallic cylinder- unlike the dynatec scaremonger it does not have a central safety pin hole, it has an almost identical spring loaded firing pin, which I can press down on, but there is no way to lock it in the primed position.
any help to identity it is great, PS I’ve searched bird scarers, security trip wires, and many other terms, involving blank firing devices lol, lots of similar things but nothing the same
The one on the left is a scaremonger, the one on the right isn’t, it’s the right one I’m interested in