- What is the current thinking/ solution for simulating rifling in a main gun barrel; I've heard of various inserts- 3D printed or rolled metal
- Is there a supplier for AFV optical equipment or is each up their own design? I've simulated these in smaller scale but here more detail in needed
a short plug broach could be made, likely more than one to cut shallow (very shallow) grooves for a short length of the barrel. Using a PaK 75 as an example having 32 grooves and a progressive twist (I believe anyone could be forgiven the progressive part in a model!). I don't have the exact groove depth of the original to hand but a few thousandths of an inch for a model should be sufficient.