About this 3D model

This is a grenade I made to have a sciency feel, but still have some throw backs to normal grenades. The grenade is in three pieces, the body, the cap, and the pin. To assemble the grenade put the cap which is the mushroom shaped part into the hole in the top, then take the pin which is the c shaped part, and place the longer end in the hole in the side of the body, and the shorter end over the cap, then you're done. To make the grenade spring loaded place a spring in the cavity in the grenade body.