Ding126 Posted July 11, 2009 Share Posted July 11, 2009 (edited) With everyone adding a one piece mag tube. Where are you finding the other parts needed to comply with the required US Parts? Thats why I choose the factory 2 rnd ext. I can easily take it off and install the limiter ATF-346, 58 FR 40589, July 29, 1993 § 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 © 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 §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. © 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 (trunions) (5) Muzzle attachments (6) Bolts (7) Bolt carriers (8) Operating rods (9) Gas pistons (10) Trigger housings (11) Triggers (12) Hammers (13) Sears (14) Disconnectors (15) Buttstocks (16) Pistol grips (17) Forearms, handguards (18) Magazine bodies (19) Followers (20) Floorplates The parts breakdown for the M4 Super 90 is: 1. Receiver 2. Barrel 3. Bolt 4. Bolt carrier 5. Gas piston 1 6. Gas piston 2 7. Trigger housing 8. Trigger 9. Hammer 10. Disconnector 11. Buttstock 12. Pistol grip 13. Handguard 14. Magazine body/Tube 15. Follower Replace 5 of those and you're gold. You do not have to have less than 10 parts. Edited July 11, 2009 by Ding126 Quote Link to comment Share on other sites More sharing options...
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