What is a chalk round?
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In a head-scratching ruling, the ATF has reclassified 40mm practice (“chalk”) rounds and 40mm flares as “destructive devices”, putting them in the same category as actual explosive 40mm grenade ammunition.
What is a HEDP round?

The HEDP (high-explosive, dual-purpose) M430 cartridge, joined with M16A2 links, is the standard round for the MK 19. The impact-type round penetrates 2 inches of steel armor at 0-degree obliquity and inflicts personnel casualties in the target area.
What is a 203 round?
The M203 is a single-shot 40mm under-barrel grenade launcher designed to attach to a rifle. It uses the same rounds as the older stand-alone M79 break-action grenade launcher, which utilizes the High-Low Propulsion System to keep recoil forces low….M203 grenade launcher.
Launcher, Grenade, 40mm, M203 | |
---|---|
Designer | AAI |
Designed | 1967–68 |
Can you legally own a grenade launcher?
6. Grenade Launcher. A grenade launcher is a weapon you might expect to see in open warfare, but owning one is actually permitted in the U.S. under federal law – albeit with restrictions.

Are 40mm legal?
Standard-issue 40mm launchers are classified as “non-sporting” firearms and “destructive devices” by the National Firearms Act, sold solely to military and law enforcement agencies around the world.
What is an M406 round?
The M406 cartridge is a high explosive round designed to inflict personnel casualties using ground burst effect. Description: This cartridge is a fixed round of ammunition consisting of an aluminum projectile body with a rotating band and a cartridge case assembly containing the propelling charge and percussion primer.
What is the maximum range of the M406?
Maximum Range 1,312 ft (400 m) Muzzle Velocity 250 fps (76 mps) Arming Range 45 – 90 ft (14 – 27 m) Effective Bursting Area Casualty radius: 427 ft (130 m) Kill radius: 16 ft (5 m) Use: The M406 cartridge is a high explosive round designed to inflict personnel casualties using ground burst effect. Description:
What is 40mm used for in the military?
The 40mm cartridge family now includes a spectrum of capabilities including high explosives, anti-personnel, illumination, smoke, gas and other purposes. USMC CPL Jason Desautels load a 40mm cartridge into his M203 Grenade Launcher/M16A2, Shoalwater Bay Training Area, Australia, 25 May 2001.
What is the m407a1 cartridge?
The M407A1 cartridge is a fixed practice type ammunition. Replaced by the the M781 practice cartridge. Description: This cartridge is a fixed round of ammunition consisting of an aluminum projectile body with a rotating band and a cartridge case assembly.