At that time, TDI company claimed that KRISS Super V used a technology to transmit recoil downward, instead of backward acting on the shooter's hand or shoulder. This unique principle design not only greatly reduces the recoil feeling, so that the muzzle basically does not jump when shooting automatically, but also reduces the weight of the gun by more than 50% compared with similar weapons, and the total number of parts (including moving parts) is also reduced to the lowest. It is said that the unique principle of the KRISS Super V submachine gun was invented by the Swiss (Kriss means "dagger" in Switzerland), and now the design, production and sales of the KRISS Super V submachine gun are all improved in the United States by TDI company headquartered in Washington. Interestingly, Washington is the most anti-gun city in the United States, but it is said that TDI production plants are in other States, presumably in Virginia.
TDI also claimed in its official website that it entrusted Remington Company to submit a sample gun to the U.S. Army Picatinny Arsenal for testing on June 5438+065438+ 10, 2005, and the U.S. Marine Corps also participated in the army's test firing of the gun.
However, in reality, this gun is a KRISS Mk5 gun released at the end of 2005, with a very simple and peculiar appearance. Because it was not announced at that time how it transferred the recoil, it was inferred from the appearance that the axis of the barrel was lower than the extension line of the forearm and the center of the fist, so this ergonomic design was adopted, which effectively reduced the muzzle jump and offset the influence of recoil during automatic shooting. KRISS Mk5 sample gun adopts long 3-&; Frac34 one-inch (about 95.3 mm) stainless steel barrel has four wide aluminum rings nested in the front of the barrel to simulate the weight of the flame arrester. If the shooter wants to shoot with both hands, the non-shooter can only grab the barrel. Because of this, the barrel is covered with a layer of insulation sleeve made of sponge, so some people suggest redesigning the magazine socket and lengthening it to make it double as the front grip, or designing a real front grip (fixed or folding).
The gun fired 45 ACP bullets. Because it can only be fully automatic and the firing rate is as high as 1 200 rounds per minute, it consumes a lot of ammunition. The magazine was modified with m1911a1pistol magazine, and seven bullets were used up in a blink of an eye. Designers also understand that the firing rate of submachine guns is too fast, so they plan to reduce the firing rate to about 850 rounds per minute. However, on a small gun weighing less than 4 pounds (MK5 weighs 3.9 pounds, and the designed target weighs about 3 pounds), most shooters will think that it is not easy to control a .4545ACP bullet with strong recoil at the high firing rate of 1.200 rounds per minute. But KRISS MK5 is relaxed when shooting, and according to people who have tried shooting, the recoil feeling is even better than 1900.
KRISS Super V is very suitable for CQB or non-first-line combatants as a self-defense weapon because of its low recoil, easy control, compact shape and easy carrying. However, according to people who have experienced it, the trigger stroke of Mk5 is a bit too long and the trigger force is relatively heavy. In addition, for the shooter who is used to using the traditional loading handle, the eccentric loading lever of Mk5 (behind the magazine socket, pulling down the loading, that is, the lever that will be pulled up and down in the video) will be very uncomfortable. Besides, its barrel is too short, which is a problem for accuracy. However, TDI people said that the basic purpose of Mk5 is only to show its design principle, and it will be adjusted in future models. In addition, it is planned to design 30 magazines or 30 magazines for general Thomson submachine guns. According to TDI, the KRISS V submachine gun can be applied to other calibers, so it is presumed to be 9x 19mm or 40s&W caliber.
Throughout 2006, TDI and KRISS super V submachine guns were silent. However, in June 5438+1October, 2007, at the Colorado 2007 Shooting Exhibition, KRISS Super V once again entered people's field of vision, and became one of the most eye-catching weapons at the 2007 Shooting Exhibition with its interesting appearance and unique action mechanism. TDI set up a booth at this year's SHOT Show, which not only exhibited the real prototype gun of KRISS Super V, but also posted a large structural diagram on the booth.
Although the shape of the official prototype of KRISS Super V submachine gun is still strange, it has been improved in many aspects and become more practical. The barrel is lengthened to 5.5 inches (about 139.7mm), and the horizontal position of the barrel is also raised, KRISSSuperV.
It turns out that the barrel of the MK5 sample gun is near the bottom of the grip, and now it is in the horizontal position of the trigger. The magazine has been changed to the magazine of Glock 2 1 pistol in Austria. Standard magazine capacity 13 rounds, longer magazines carry more bullets. The redesigned loading handle is more traditional, located on the left side of the housing and moves horizontally. When not in use, the lever-shaped handle filled with the pull handle automatically sticks to the side of the watch case under the action of the spring, so it is not easy to hook when carrying guns or making tactical actions. If the shooter wants to check whether the gun chamber is full of ammunition, he can see the situation of the gun chamber without pulling the bolt, just pulling the rod handle to the vertical state. Of course, pull the lever back to the bottom, then let go, and the bolt will be put back in place, and a bullet will be pushed into the gun chamber at the same time. Filling handles can also be used to remove defective housings or stuck empty housings.
Compared with the principle verification gun which can only be fully automatic, the prototype gun adds a reducer. TDI Company has introduced two models, one of which can be used in continuous shooting and the other in continuous shooting. Its serial number is "25", which means that TDI may design a magazine with a capacity of 25 rounds instead of 30 rounds as originally planned. But the latest news says that 28 magazines have been developed so far. However, the prototype gun has a strange design. Safety and deceleration are independent. The manual safety handle is located above the grip and the deceleration handle is located above the trigger. In this regard, the staff of TDI Company replied that the independent safety and speed increaser handles were made at the request of some users, but if necessary, they also fully integrated the functions of safety and speed increaser into one handle, which is convenient for the shooter's thumb operation.
The gun adopts the principle of delayed recoil operation, and the counterweight behind the bolt also plays the role of delayed recoil. When the bullet is fired, the shell pushes the bolt under the action of gunpowder gas. The latch must first overcome an inclined plane that delays unlocking, and then begin to move horizontally backwards. Through the inclined plane of the counterweight, the counterweight is forced to move downward under the guidance of the composite spring guide rod, and the composite spring is pressed to the base. But at the same time, because the lug of the bolt is stuck in the groove of the counterweight, when the bolt moves horizontally for a certain distance, it will be driven by the counterweight to deflect downward. After the recoil spring is completely compressed, the counterweight begins to move upward. Under the action of the same inclined plane, the bolt machine moves forward, pushing the next bullet into the gun bore.
For internal energy automatic weapons, the recoil of light weapons that the shooter feels when shooting is mainly composed of two parts: one part is the reaction force of gunpowder gas ejected from the muzzle at high speed on the barrel when the warhead flies out of the muzzle; Second, the pressure at the bottom of the shell acts on the whole weapon through the bolt and barrel, because the recoil movement of the gun group of these weapons stops when it hits the shell tail (such as AK, etc.). ) or buffer (such as M 16, etc. At this time, the residual energy of the recoil of the gun group will be transferred to the shell casing, which will make the weapon produce recoil movement in the opposite direction to the bullet movement.
KRISS Super V submachine gun transmits the above-mentioned second recoil energy by balancing the up-and-down movement of the counterweight, so that the weapon generates downward force when the bolt moves to suppress the upward jump of the muzzle. It is said that the total weight of KRISS Super V submachine gun is much lighter and more compact than that of ordinary free recoil submachine gun. In addition, because the muzzle of the gun is located at the horizontal position of the trigger, this structure also helps to push the weapon straight back when shooting, instead of making the muzzle jump up.
On the KRISS Super V prototype gun currently on display, its theoretical firing rate can be adjusted, with the highest firing rate of about 1500 rounds/min and the lowest firing rate of about 650 rounds/min. However, because the principle of "Chris-Super V" submachine gun is very effective in reducing recoil, its firing is completely controllable (at least in theory) even at extremely high firing rate. In the online video released by TDI company, it can be seen that even if petite women are allowed to shoot automatically, the angle of muzzle jump is less than 2. One-handed continuous shooting has dense projectiles scattered. However, it can also be found from the video that KRISS Super V still has obvious recoil when launching, which is not "extremely low", but basically does not jump. At present, KRISS Super V submachine gun is said to have entered the final stage of mass production, but the specific mass production time is still unclear, and there may be more improvements in future production. Figure (left) In 2008, a new semi-automatic civil carbine CRB/SO with a barrel of 16 inch was introduced. TDI company disguised the appearance of the barrel as a muffler in order to make it easy for buyers to accept the long barrel psychologically.