Semi-Automatic NERF Longshot

Step 2: How the bolt works

The setup I used is an open bolt system. Meaning that when you pull the trigger to launch the dart the bolt shoots forward; both loading the round and then firing it. The images below will better illustrate how it works. Don't be scared by the images, I simplified the machining of the bolt drastically which you will see in the next step. 

Stage 1: The bolt is at rest and a magazine of NERF darts is loaded into the blaster. 

Stage 2: The trigger is pressed and the solenoid valve allows a burst of air to pass into the piston assembly

Stage 3: The piston slides forward chambering the NERF dart into the barrel. At the end of it's extension the hole through the center of the piston passes the end of the pin riding through it. This allows the air in the piston to exit the barrel and propel the projectile. 

Stage 4: The spring in the piston can now return it to the open position, and is now ready to fire again. 

Just look at the pictures, it's harder to describe it in words. 

Comments

[thedwarmastermind]

how much did this all cost ?

[llima1]

okay heres a question why not use a solenoid to pull the plunger rod back instead of using air? and just put a battery inisde the enormous free space the longshot has inside of it

[alexw2150]

What program is that?