A different way of defining what an assault weapon is

[Kaleva]

Last edited Tue Oct 10, 2017, 07:57 PM - Edit history (2)

Any semi-automatic weapon that fires a rimless, semi-rimmed, or rebated rim center-fire cartridge that has a bullet of less then 6.5mm in diameter or a metal based case length of less then 50.8mm or caseless ammunition of any dimension or any rimless, semi-rimmed or rebated Polymer-cased center-fire cartridge of any dimension.

The appearance of the gun has nothing to do with the above definition. The gun could look like a hunting rifle or it could look like something out of a Hollywood war movie. The gun could have a bayonet lug, grenade launcher, flash suppressor, pistol grip or folding stock and it might not be an assault weapon as defined by above. Or it could. It all depends on the action of the gun and the cartridge it fires.

Such a definition keeps things simple. All one has to do is first determine if the gun is a semi-automatic, see if the cartridge it is loaded with is a center-fire round and then measure the cartridge. No fuss. No muss.

If one has an issue with including semi-automatic handguns in the above, then one could refine it further by saying an assault weapon is a semi-automatic firearm that has a barrel length of 16" or longer and fires a rimless, semi-rimmed, or rebated rim center-fire cartridge that has a bullet of less then 6.5mm in diameter or a case length of less then 50.8mm.

A semi-automatic, or self-loading, firearm is a weapon that performs all steps necessary to prepare the weapon to fire again after firing—assuming cartridges remain in the weapon's feed device or magazine. By pulling the trigger and firing, the gun uses the energy of the fired cartridge to cycle the action of the firearm to eject the spent case and advance the next available cartridge into position which allows another shot to be fired when the trigger is pulled again.

A center-fire cartridge is a cartridge with a primer located in the center of the cartridge case head.

"The rimmed cartridge is the oldest of the types and has a rim that is significantly larger in diameter than the base of the cartridge. "

"On a rimless case, the rim is the same diameter as the base of the case; it is known as an extractor groove."

"On a semi-rimmed case the rim projects slightly beyond the base of the case, though not as much as a rimmed cartridge."

"Rebated rim cartridges have a rim that is significantly smaller in diameter than the base of the case, serving only for extraction."

https://en.wikipedia.org/wiki/Rim_%28firearms%29

Rimmed cartridges do not have an extractor groove.

According to the Sporting Arms and Ammunition Manufacturers' Institute (SAAMI), a cartridge is "a single round of ammunition consisting of the case, primer and propellant with or without one or more projectiles." Only the projectile portion is the bullet.

The case length of a 7.62x39mm cartridge is about 38.7mm




Polymer-cased ammunition (or PCA) is the concept applied to define the alternative to use polymer-based casings instead of metal-based (brass, aluminum or steel mainly) in the manufacturing of ammunition.

Caseless ammunition is a type of small arms ammunition that eliminates the cartridge case that typically holds the primer, propellant, and projectile together as a unit.


Steps to determine if a firearm is an assault weapon

1. If the firearm is a semi-automatic, proceed to step 2.

2. If the barrel of the firearm is 16" or longer, proceed to step 3.

3. Examine the ammunition the firearm is designed to fire or is currently loaded with or has been modified to fire. Proceed to step 4 if any of the following conditions are met:

a. The ammunition is a center fire rimless, semi-rimmed or rebated rim cartridge with a bullet diameter of less then 6.5mm

or

b. The center fire cartridge case is less then then 50.8mm long

or

c. the ammunition is a caseless cartridge of any dimension

or

d. the cartridge is a Polymer-cased ammunition of any dimension

4. The gun in question is an assault weapon.

Note: I first posted this back in 2012