(Video Link)
What's going on here? There's little information about the mod, but Mike at Everyday, No Days Off speculates:
It looks to me like there’s some type of plunger at the back of the shotgun, which is likely in contact with the firing pin. The cable then whacks that and… BOOM.
-via Everyday, No Days Off
arrows with solid fuel boosters(impact with string
sets off impact igniter) and fused anti-personnel
warheads.....
I prefer two spaces twixt my sentences,thank you!