I made my own nerf firestrike out of k-force parts. Hope you enjoy!
Step 1: Body/Handle
Pic 1: make 2 of these
Pic 2: attach 1 to handle
Then attach the orange rod on the bottom to the yellow connector on top
Step 2: Plunger Assembly/"Blaster Chamber"
Pic 1: attach the plunger assembly to the part of the body you put on
Pic 2: attach the other side of the body
Step 3: Dart Holder
Add another yellow/black connector to the side of the ones on the plunger.
Step 4: Done!
You have completed the nerf firestrike made out of knex k-force parts! Now shoot your knex/human Target!(to fire you put your thumb behind and push the button, I was too lazy to put a trigger)