This is not a simple change to make, and rests on his ability to design and manufacture a bolt-action that fits in the gun, works with the Nerf ammo, and uses a CO2 canister and solenoid valve for ...

Variants of some of these machine guns are still in use today, including the German MG3. The fastest-firing guns have a maximum rate of fire of up to 1,200 rounds per minute. Click here to see the ...