Above post is 100% wrong! As I said before a imported milled VZ/AK needs 5 parts for 922 but 6 parts for a Stamped Receiver rifle!
From the Govt website, read bottom paragraph and U see 5 Parts only needed!
922 (r)
The Imported Parts Law (1990)
178.39 otherwise known as 922(r) 10 Foreign parts law on semi auto Rifles & Shotguns
http://www.atf.treas.gov/regulations/27cfr178.html Sec. 178.39 Assembly of semiautomatic rifles or shotguns.
(a) No person shall assemble a semiautomatic rifle or any shotgun using more than 10 of the imported parts listed in paragraph (c) of this section if the assembled firearm is prohibited from importation under section 925(d)(3) as not being particularly suitable for or readily adaptable to sporting purposes.
(b) The provisions of this section shall not apply to:
(1) The assembly of such rifle or shotgun for sale or distribution
by a licensed manufacturer to the United States or any department or agency thereof or to any State or any department, agency, or political subdivision thereof; or
(2) The assembly of such rifle or shotgun for the purposes of
testing or experimentation authorized by the Director under the
provisions of Sec. 178.151; or
(3) The repair of any rifle or shotgun which had been imported into or assembled in the United States prior to November 30, 1990, or the replacement of any part of such firearm.
(c) For purposes of this section, the term imported parts are:
(1) Frames, receivers, receiver castings, forgings or stampings
(2) Barrels
(3) Barrel extensions
(4) Mounting blocks (trunnion)
(5) Muzzle attachments
(6) Bolts
(7) Bolt carriers
(

Operating rods
(9) Gas pistons
(10) Trigger housings
(11) Triggers
(12) Hammers
(13) Sears
(14) Disconnectors
(15) Buttstock
(16) Pistol grips
(17) Forearms, hand guards
(18) Magazine bodies
(19) Followers
(20) Floor plates
The 16 countable parts of an AK rifle. No more than 10 of these parts may be imported.
On a typical stamped receiver rifle you need to replace 5 parts with no muzzle attachment and 6 parts with a muzzle attachment.
On a typical milled receiver rifle you need to replace 4 parts with no muzzle attachment and 5 parts with a muzzle attachment, because there isn't a barrel trunnion, it is part of the receiver.