37 mm flare
Encyclopedia
The 37 mm flare caliber is the specification for a civilian legal variant of the US military's 40 mm grenade
system. In contrast to the military 40mm systems, which are rifled and therefore would fall under the NFA, 37mm systems are typically not rifled.
To avoid classification as "destructive device
s" under the National Firearms Act
, the 37mm launcher is not rifled, and ordnance fired from 37 mm flare launchers are typically non-weapon rounds. Such rounds include:
Where weapon rounds are to be fired from a 37 mm launcher, it must have a destructive device tax stamp, as must the individual weapon rounds.
37 mm flares can be fired from a variety of devices, including standalone launchers, and M203 style launchers mounted on rifles with rail mounting systems
.
40 mm grenade
The 40mm grenade is a military grenade caliber for grenade launchers in service with many armed forces. There are two main types in service: the 40×46mm, which is a low-velocity round used in hand-held grenade launchers; and the high-velocity 40×53mm, used in mounted and crew-served weapons. The...
system. In contrast to the military 40mm systems, which are rifled and therefore would fall under the NFA, 37mm systems are typically not rifled.
To avoid classification as "destructive device
Destructive device
In the United States, a destructive device is a firearm or explosive device regulated by the National Firearms Act of 1934.Examples of destructive devices include grenades, and firearms with a bore over one half of an inch, including some semi-automatic shotguns. While current federal laws allow...
s" under the National Firearms Act
National Firearms Act
The National Firearms Act , 73rd Congress, Sess. 2, ch. 757, , enacted on June 26, 1934, currently codified as amended as , is an Act of Congress that, in general, imposes a statutory excise tax on the manufacture and transfer of certain firearms and mandates the registration of those firearms. The...
, the 37mm launcher is not rifled, and ordnance fired from 37 mm flare launchers are typically non-weapon rounds. Such rounds include:
- flares
- smoke rounds
- noise effect rounds
Where weapon rounds are to be fired from a 37 mm launcher, it must have a destructive device tax stamp, as must the individual weapon rounds.
37 mm flares can be fired from a variety of devices, including standalone launchers, and M203 style launchers mounted on rifles with rail mounting systems
Rail Integration System
Rail Interface System are the primary method of attaching accessories to small firearms such as assault rifles and light machine guns...
.