Perimeter Alarms

[Big Frank]

Those 2 perimeter trip alarms are the same ones I posted a link to. And now, thanks to the video, we know a 12 gauge blast to the face from a foot away would be a bad thing, no matter what kind of shell it is. And that guy in the video seems to think it was Fifth Ops with an "f" in the middle of fifth, but it's not. It's FITH OPS, as in the abbreviation for Fire In The Hole. It even says FIRE IN THE HOLE at the top of the web page.

[MikeBjerum]

Gentlemen,

Let us learn from the bad guys.

While working as en Emergency Services Instructor, I learned a lot.  Here is how to build a tripwire or jolt activated device:

One mousetrap
Short piece of 2x4
JB Weld
1- 16 penny nail
4 - 1" tacks
1 - shotshell of your choice

TOOLS
Hammer
Hacksaw
Drill
Screwdriver bit
Drill bit (diameter to match shotshell)

INSTRUCTIONS
Tack mousetrap to 2x4;
Mark point where the small bumping on the trap bail contacts the trap surface;
With the bail held back, drill through the trap and 2x4;
Cut the point off the 16 penny nail;
Using a spent shotshell, use JB Weld to bond nail point to the trap bail like a firing pin.

This device can now be used as a trip wire alarm or weapon, or it can be mounted to activate by jolt.

Many meth cookers, and the like would mount these on their doors.  When Law Enforcement came pounding, the banging on the door would set them off.

[Rastus]

I ended up with a few units set up for 22 blanks. 

[Big Frank]

I ended up with a few units set up for 22 blanks.

That's sure cheaper than using 12 gauge blanks. I wonder how loud the most powerful Ramset blanks would be? You should be able to find from power level 2 up to level 4 (yellow), 100 per box, just about anyplace that sells tools. Regular .22 blanks are harder to find in my experience.

http://www.ramset.com/products/accessories/powder-loads/22-caliber-single