I'm just playin... purely comical. I have no desire to serve the 20 years of forced sodomy (prison) for bringing back an explosive device!
I just kept it to simple, harmless stuff... A friend of mine did bring back two 40mm grenade rounds (one High Explosive Dual Purpose, one white star-cluster). Accidental though; several months later, emptying bags of gear he hadn't needed till then, they both fell out of his web gear.