Its radius is about 7 to 13 feet depending on the throw. This is my first instructable so any constructive criticism is very helpful. Btw if Mykhailo doesn't want me to post this then I will remove it.
Step 1: You Will Need
#1 = the body
#2= the shrapnel
Step 2: Constuction of the Body
#1= what you will be building
#3= More construction
Step 3: The Shrapnel Filling and Adding the Top
#1= fill body with shrapnel
#2= alternate shrapnel ( recommended)
#3, #4= Yay! your done!
Step 4: Firing.
My radius was about 7-13 ft.
PICTURES COMING SOON.
Step 5: My Secret Knex Facility. ( Ahem *cough* My Room *cough*)
I Have Killerk's Pistol, The SRv1 !!!!!!!!!!!!! =D , another grenade, my knex box, and then Mykhailo's knex pistol.