Here are some more pics of my custom Delrin Extender with Brass pin being installed.
Here are a few pics of it installed with different Attys:
Russian 91%
Ithanka
iClear 30S
Here are the Dimensions of the pieces with Pics:
The Brass Pin seems to work best at 16.85mm
Note: If you want to add a Kick to this Kick Tube, it needs to be under 16.85mm or you wont be able to screw the assembly completely together.
I use a Crown which is 8mm in height and then add my shorter version of this Delrin Extender/Brass Pin to make up the difference on my Horizontal setup.
Delrin Height is 14.00 mm
Delrin Taper Wide end is 18.60mm
Delrin Taper Narrow end is 17.90mm
So hopefully this will help you mod your Hammer's Kick Tube to be used as a Atty Extender.
Edit: Heres a pic of the above Delrin Spacer mod in the Kick Tube installed under the Fire Button in a Horizontal config. This Spacer works in both variations