I broke down my A&K SVD last night and found the hop up adjustment grub screw is stuck. The 1.5mm hex head on it has stripped (so the allen bolt just spins) and I can't get the little blighter out.
I reckon the only solution is to drill it out and tap the hole for a larger grub screw.
Here is my question-
The hole is 3mm (I think), do I use a 3mm drill bit and a 4mm tap or do I need to use a 4mm bit and a 4mm tap?
I will be using a hand drill and whatever set of tap and dies I can find on the net for cheap.
Are both my suggestions totally wrong? If this is the case, lets hear from the experts please.