NERF Dracogen (short) barrel extension

This is a shortened version of the Dracogen barrel, http://www.thingiverse.com/thing:451186. It should fit and print in one part on "more normal height" 3d printers.
It's based on a modded "Dracogen STV space gun" kit that Volpin Props[1] made.
There is a "bayonet mount" ring mount that lets you connect it to some NERF blasters. The added length might incease the accuracy of your shots, or the friction may make them worse. But it looks cool!
The two versions here represent a 145mm barrel length and a 125 barrel length. You probably need the shorter
125mm version.
I have made several other designs with various greebles.
DO NOT FORCE CONNECTION or you may break your NERF blaster.
Read instructions before printing.
I would love to get feedback from people.
1] Based on https://www.flickr.com/photos/volpinprops/14877022158/