All boobytrap's are able to be screwed into grenades or special fuze wells in landmine bodies. Each boobytrap is designed to have a non electric cap crimped to the end which is set off by a percussion primer located in the base coupler.
This is the first M1 pressure device adopted by the US. The design was taken after the British no. 2 boobytrap.
The M1a1 pressure device was developed during the second world war. A threaded hole on the pressure head allows a 3 prong adapter and or an extension adapter.
The M1 chemical delay pencil was desinged after the British no.10 chem pencil. The color band indicates delay time there are 6 colors; black, red, white, green, yellow, and blue.
This M1 release boobytrap was designed during WWII. It is used under mines or any other items that would be moved to release the pressure. It works much like a grenade when the spoon is released.
The M5 release works just like the M1 release. The M5 is much smaller thus easier to use as a boobytrap.
The M1 concussion devise was attached to explosives which was in a vicinity of other explosive charges. When a blast concussion hit this device it would be set off.
The M3 pull/release boobytrap works on a trip wire. It is able to be set to detonate when tension is applied or applied and released.
The M142 is a newer boobytrap that was adopted from the Australian military. It can be set in any mode; pull pressure, tension release, and release
The M147 delay boobytrap can be set to fire any where from 5 min. to 30 days. Its very reliable five min. after setting it could not be turned off.