什么是defensive article
https://www.law.cornell.edu/cfr/text/22/120.6
§ 120.6 Defense article.
Defense article means any item or technical data designated in § 121.1 of this subchapter. The policy described in § 120.3 is applicable to designations of additional items. This term includes technical data recorded or stored in any physical form, models, mockups or other items that reveal technical data directly relating to items designated in § 121.1 of this subchapter. It also includes forgings, castings, and other unfinished products, such as extrusions and machined bodies, that have reached a stage in manufacturing where they are clearly identifiable by mechanical properties, material composition, geometry, or function as defense articles. It does not include basic marketing information on function or purpose or general system descriptions.
https://www.law.cornell.edu/cfr/text/22/121.1
§ 121.1列了一堆禁运清单,各种口径的长枪短炮,军用级别瞄准镜,消音管等等等等
Category I - Firearms, Close Assault Weapons and Combat Shotguns
* (a) Nonautomatic and semi-automatic firearms to caliber .50 inclusive (12.7 mm). * (b) Fully automatic firearms to .50 caliber inclusive (12.7 mm). * (c) Firearms or other weapons (e.g. insurgency-counterinsurgency, close assault weapons systems) having a special military application regardless of caliber. * (d) Combat shotguns. This includes any shotgun with a barrel length less than 18 inches. * (e) Silencers, mufflers, sound and flash suppressors for the articles in (a) through (d) of this category and their specifically designed, modified or adapted components and parts. (f) Riflescopes manufactured to military specifications (See category XII(c) for controls on night sighting devices.) * (g) Barrels, cylinders, receivers (frames) or complete breech mechanisms for the articles in paragraphs (a) through (d) of this category. (h) Components, parts, accessories and attachments for the articles in paragraphs (a) through (g) of this category. (i) Technical data (as defined in § 120.10 of this subchapter) and defense services (as defined in § 120.9 of this subchapter) directly related to the defense articles described in paragraphs (a) through (h) of this category. Technical data directly related to the manufacture or production of any defense articles described elsewhere in this category that are designated as Significant Military Equipment (SME) shall itself be designated SME. (j) The following interpretations explain and amplify the terms used in this category and throughout this subchapter: (1) A firearm is a weapon not over .50 caliber (12.7 mm) which is designed to expel a projectile by the action of an explosive or which may be readily converted to do so. (2) A rifle is a shoulder firearm which can discharge a bullet through a rifled barrel 16 inches or longer. (3) A carbine is a lightweight shoulder firearm with a barrel under 16 inches in length. (4) A pistol is a hand-operated firearm having a chamber integral with or permanently aligned with the bore. (5) A revolver is a hand-operated firearm with a revolving cylinder containing chambers for individual cartridges. (6) A submachine gun, “machine pistol” or “machine gun” is a firearm originally designed to fire, or capable of being fired, fully automatically by a single pull of the trigger.
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