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The 37 mm flare or "1.5 inch" caliber is the specification for a common launching system for non-lethal and less-lethal ammunition. Such launchers are also often known as "gas guns" due to their original use by police for launching tear gas projectiles. 37mm systems are typically smoothbore as rifling is unnecessary or even detrimental to the performance of the usual projectiles. 37mm rounds can be fired from a variety of devices, including standalone launchers, and M203-style launchers mounted on rifles using clamping systems or rail mounting systems. In the United States, 37mm launchers are exempted from the National Firearms Act of 1934 so long as no anti-personnel rounds are in the user's possession. Only non-anti-personnel rounds may be possessed or used. Such rounds include: * flares * smoke rounds, to include irritating "smoke" such as CS or OC agents * noise effect ("bird bomb") rounds Where anti-personnel rounds are to be fired from a 37 mm launcher, the launcher must be registered with the BATFE as a destructive device. Possession of a destructive device is also restricted or banned by some local and state laws. The specific wording of the BATFE rule is:
Rounds that are considered anti-personnel include: Less-lethal rounds: * rounds loaded with rubber pellets * rounds loaded with plastic or wooden batons * "bean bag" rounds consisting of a cloth bag filled with lead pellets Lethal rounds: * buckshot * flechette rounds Such rounds are not considered destructive devices, but are not readily available to non-government purchasers. A round containing an explosive payload of over 0.25 ounces would itself be classified as a destructive device, requiring BATFE registration. == See also == * 40 mm grenade * Riot gun * TBL-37 * Title II weapons 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「37 mm flare」の詳細全文を読む スポンサード リンク
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