MK 2 Hand Grenade Probably the most easily recognized hand grenade in the world. I think we all played with the plastic toy versions at some point. It’s often referred to as the “Pineapple” because of it’s distinct texture and resemblance to the fruit. Note that the safety lever is painted blue to designate that it is inert and deactivated. A very cheap and easy way to begin an inert ordnance collection since so many are available on the surplus market.