Airsoft AK magazine (powered by rubber bands)

This is an early prototype , and not very aesthetic , i am working on a full size 30 BB version but my printer is not big enough to print it. If you would like to help me test out the large version contact me on discord ( andz0001 ). 

you will need 2 rubber bands with a length of about 8cm while not stretched at all and a small spring from a pen. as well as 5 20mm M4 nuts and bolts with rounded head (you could also 3d print the bolts , as they dont need to be very strong)

print 4 rollers and place them on the pins inside the hollow part of the magazine , tie the rubber bands together, then use cooking oil or any other lubricant on the rubber band an the rollers , place one end of the rubber bands over the bottom pin furthest away from the circular groove that holds the BBs. Loop the rubber bands across the top pin closest to the first pin , then the other bottom pin , followed by the last top pin . place the follower in the circular channel and place the other end of the rubber bands . Take the stopper , push the spring down on the round part , then with the spring facing towards the wall , compress the spring and fit the piece in the pocket. Place the other half on top of the magazine and fix it in place with the bolts , make sure not to tighten them too hard or the follower might get stuck.

Stopper-purple

follower-red

spring - grey

rubber bands - black