Make sure your imported parts count is ten or less of the following imported parts:
(1 ) Frames, receivers, receiver castings, forgings or stampings**
(2) Barrels
(3) Barrel extensions
(4) Mounting blocks (trunnions)
(5) Muzzle attachments **
(6) Bolts **
(7) Bolt carriers **
(8) Operating rods
(9) Gas pistons **
(10) Trigger housings
(11) Triggers **
(12) Hammers **
(13) Sears **
(14) Disconnector’s **
(15) Buttstock’s **
(16) Pistol grips **
(17) Forearms, handguards **
(18) Magazine bodies
(19) Followers**
(20) Floorplates**
If your u.s. parts count brings the imported parts count from above to ten or less then you can have all the evil features you want. The ** denotes u.s. parts available for most AK's.....This is not legal advice make sure you check the facts with the BATF before making changes to your weapon