NERF barrel extension (#1) -- basic design

This is a basic design for a NERF barrel extension. There is a ring mount that lets you connect it to some NERF weapons and a barrel with a simple iron sight on the end. The added length may increase the accuracy of your shots.
I plan on making several more designs with various greebles on them and even useful features (like rails).
As of this upload, I have ONLY printed "nerf-barrel_extension1-test1.stl" on my MakerSpace's KosselKlear Delta Printer at 330% speed for a rough test fitting.
***It is important to note*** that the bottom portion of this test barrel did NOT fit into my NERF Rayven blaster with out significant trimming.
In the other models, I trimmed 0.5mm from the lowest portion of the barrel, but they has *NOT* been printed or tested. Use care and do not force!
The 165mm length barrel is the maximum height that will print in an 8 inch vertical printer while the 147mm length barrel prints in a 6 inch vertical.