Here's my milsim conversion of an old ICD Thundercat. I used an Ion shroud and sight with a BT stock and a Tippmann carrying handle.
I had to fabricate a dovetail rail to secure the stock and handle, and a shroud for the stock to cover the velocity adjuster.
The rail has a spring-loaded ball plunger to hold it in place and make it easy to access the velocity adjuster without tools.
