I have a Draco AK Pistol on Backorder.
How much trouble would it be to put an Underfolder stock on it?
I know you need to pay the $200 dollar tax to put the stock on and make it an SBR. But what all is involved in putting a Underfolder stock on the pistol? I have read where the AK Pistols have the Underfolder receivers on them, just not drilled out.
Here is what I'm getting



This is what I want it to look like: