I just bought a cheap used composite baseball bat, kevlar and graphite, drilled a 3/16ths hole in the end and filled it with a mix of some spare lead birdshot and silica beads i use for sand blasting, put a pop rivet in the hole.
Now its much heavier and is a deadblow. Still loks just like a bat, stays in the vehicle with my “other” tools. The ones that propel .45 bullets.
No nails?