Doesn't appear to be robust enough for heavy duty explosives...and, without seeing how they are designed, looks to fragile to be trusted as a primer for an artillery shell...a good bump with about anything might set it off.
I'm thinking of something lower power...m58's Chaff Deployment might be the right range for it.
Might be a way to start a heater without having to fumble with matches or what ever ....something like that.
Might be the charge for an emergency flare gun in a survival kit.
And just because the rotten slime ball said he didn't say it had nothing to do with aircraft doesn't mean it does.