Nerf Retaliator Easy Pump Action Barrel

edited in tinkercad. I added a barrel adapter to the end of the barrel and made a custom pump grip. I recommend only using ad-ons with this that do not have an inner barrel.
IMPORTANT: Parts may not fit on smaller printers. Minimum need hight: 22 centimeters.
(Barrel CAN still be used with original system)
Update (11/28/2017): wholes added to pump bar to secure with screws to the pump grip rail and to the Retaliator rail. I made this system to be easily removable, but added these wholes for extra secureness if necessary.
Update (2/10/2018): Fixed Barrel attachment end to be stronger.
Original System: https://www.thingiverse.com/thing:2019900
recommended ad-on: https://www.thingiverse.com/thing:2451284