I am sorry to tell you the days of cheap AK building are way past us--
Like I said it is by far not the cheapest way to go using a AMD kit- here is the breakdown
**JG Sales AMD kit $170
**Replacement barrel (AKM style 16") $80-100
**New longer gas tube $20
**New longer piston $15
**Nodak NDS-3 $60
**Standard rear trunnion $ 20 (AMD rear trunnion is specific to the AMD folding stock, you can't use it with anything else)
** Buttstock $20 and higher (depending on what type, wood/etc...)
** Plus you still need an additional 4 compliance parts (FCG coudl be 3 at $30, pistol grip would be last for an additional $10)
Thats over $450
***Not to mention the biggest issue is that now your headspace can be off kilter since the bolt was not set to that barrel. If you are building it your self you will have to get a go/no go/field set of guages to verify headpsace (around $60 for a set), or if you are having someone build it for you they will typically charge a bit more for the headspacing job on top of build services.
The Rear trunnion and buttstock could be used from the AMD kit, but if so, you will need to purchase the Nodakspud NDS-65 receiver ($80 instead of $60)
OR--- You can get something like this G series kit that the seller was selling for $320 shipped
That plus a $60 Nodak 3 reciever, $30 for the U.S. FCG, $10 for a US made pistol grip, and $10 for the US made muzzle device will get it done for you-- ($430) and since it should be a matching kit you won't have to worry about the headpspace being off