Grenade

 

This is an example of a hand grenade as was used during the Revolution.  Measuring 3.5 inches in diameter and made of cast iron, it could be thrown with precision to inflict damage to a certain area.  For source and more details, click here.

 

Image from: http://amhistory.si.edu/militaryhistory/collection/object.asp?id=288&printable=1