The Firearm Blog

Some Eastern Bloc countries have restrictive self-defense laws that prohibit bullet firing handguns but allow less lethal weapon systems such as guns that shoot solid rubber balls or paintballs filled with capsicum (pepper spray). Once such company that produces these guns is the Hungarian firm Keserű.

They make a particularly interesting rubber ball shooting gun called the Dragon which resembles what I imagine the mutant offspring of a pump action shotgun and under-over shotgun would look like.
The Dragon is powered by a .380R blank cartridge (the “R” is for “Rimmed”), which propels a rubber ball which is 18mm (0.7″) in diameter.
What I find fascinating is that the chambers are removable. To facilitate fast loading, instead of loading the ammunition components, the operator loads pre-loaded chambers, much like you would load a magazine. I suspect the local laws require the projectile and propellent to be loaded into the chamber separately, so innovative the locals came up with this duel chamber system.

18mm Rubber Balls and .380R Blank

The pump mechanism is used to lock and unlock the chambers. Its trigger makes use of a double action striker fired mechanism.

While this system has nowhere near the power of a self defense handgun, it can generate considerable energy. I am not sure about the Dragon, but the Omerta-T, which uses the same ammunition, generates an impressive 95 ft/lbs of energy. This is slightly lower than a Standard Velocity (sub sonic) 40 gr .22 Long Rifle round. The rubber ball would hurt like hell. I have a high pain tolerance and I can assure you that a less than one foot pound plastic bb fired at point blank onto bare skin is very sore. I know I would much rather be hit by a taser than a rubber ball being propelled by 95 foot pounds of energy!

Omerta-T with its magazine style removable chamber.

A Tacti-cool Dragon

Hat Tip: Дмитрий Кочетков

Future Weapons recently demonstrated a fascinating prototype less-lethal shotgun from Beretta. What is interesting is that the kinetic energy expended on the target from the rubber bullet is constant regardless of the range. This fixes a common problem with less-lethal ammunition: they are often powerful enough to kill at close range and to weak at long range to stop the target.

View though the LTLX7000 scope.

The range is configured using the holographic scope. The distance is set by moving two red dots in the scope until the bottom dot is at the feet of the target and the top dot it at the top of the head of the target. Because the approximate height of people in the region will be programmed into the scope, it can easily calculate the distance to the target. This method of calculating distance is similar to how hunters and snipers calculate range using mil-dot scopes.

The round is then fired by pulling a trigger. In the video we see a round hitting a target placed at 50 and 230 feet away at the same speed ( 309 fps).

The video:

The only way I think this could work is by venting gas from the barrel. The amount of gas vented would depend on the range selected. The more gas vented, the lower the gas pressure behind the projectile, and so the speed is reduced. The slower the projectile, the lower the kinetic energy expended on the target.

When watching the video you can see a puff of smoke coming out of the action after each shot is fired. This is not a semi-automatic firearm so it cannot be coming from the action cycling automatically. It must be coming from a vent.

I did some patent searching and I managed to find a patent entitled “Variable velocity weapon system having selective lethality and methods” that describes almost this exact system:

The present invention relates to weapon systems that accelerate projectiles using gases generated by the rapid combustion of a solid propellant, in particular, such a weapon system is able to vary the barrel exiting velocity of the projectile through a barrel venting means. In one embodiment, a front venting means exhausts gas generated by combusting propellant from behind the accelerating projectile and redirects a portion of the exhausted gas either to at least one fixed volume, to the front of the projectile, or to a combination of at least one fixed volume and to the front of the projectile. Redirecting some of the exhausted gas to the front of the projectile restrains the projectile, thereby slowing the projectile, and thus further decreasing the muzzle velocity of the projectile. In another embodiment, gas from behind the projectile is exhausted into a fixed volume, thereby decreasing projectile acceleration, and thus, the muzzle velocity of the projectile. One can use a…

Venting system proposed by patent.

The patent suggests venting gas in front of the projectile in the barrel to increase the air pressure and slow it down.

These photos are apparently of a Palestinian using some sort of homemade grenade launcher. It looks like it could be a 40mm grenade in the barrel, or maybe some type of 40mm less/non-lethal grenade like round, such as tear gas.

It appears to work by striking the firing pin (a drill bit) with a stone. I would not want to be within 200 yards of somebody firing that weapon.

Russian VOG-25 40mm Grenade. Photo from gunbroker.

UPDATE: DrStrangegun noticed that the size of the launcher is very simular to Russian GP-30 launcher. The Grenade is propelled through the vents you see in the above photo. Much like a rocket.

GP-30. From Wikipedia.

Hat Tip: MP.net