Weapon Name- M42 "Killzone"- Caseless
Round Type- 6.5mm Grendel- Caseless
Over-all length- 24.5 inches
Barrel length- 20 inches
Weight- 5.6 lb (2.55KG) unloaded, 7.1lb (3.25KG) loaded with 50 rounds, 8.5 lb (3.85KG) loaded with 100 rounds, 11.5 lb (5.25KG) loaded with 200 rounds
Rate of Fire- 560 RPM
Feed Mechanism- Helical Transparent Gear Magazine
Round Capacity- 100 rounds (Standard), 50 Round short, 200 Rounds High-Cap magazine
Effective Range- 600 m
Range- 1200 m (Supersonic, Velocity 375 m/s, 548 Joules)
Accuracy- 1.5 MOA at 600 meters
Accessories- Picanty Rail (Comes with Iron Sight)
Quick switch firing mechanism- N/A
Scope/Sights- Picanty Rail
Muzzle Velocity- 820 m/s- 7.8 Gram Projectile
Firing System- Modified TKB-022
Miscellaneous/electronic information- The weapon is an mechanically fired, automatic, Hi-Cap, caseless 6.5mm caliber weapon.
Basic Information
The weapon is essentially based off of the TKB-022, although it possess a variety of changes, a large portion of them "cosmetic".
The TKB-022assault rifle is gas-operated weapon with annular gas piston located around the barrel. To achieve minimum length, it is assembled into bull-pup configuration and uses vertically sliding bereech block (bolt), rather than traditional and most common bolt that cycles back and forth. The TKB-022 has best barrel length to overall length ratio among most military rifles ever built. Since the movement of the bolt (breechblock) in this design cannot be used to extract, eject and load cartridges,Korobov developed a special U-shaped rammer / extractor, that strips the fresh cartridge from magazine, pushes it into the chamber, then,after the discharge, pulls the fired cartridge case back from the chamber.
However, the M42 rifle uses caseless rounds, I.E. requires no cartridges to be ejected, and therefore does not require the U-shaped rammer and ejector, simplifying the mechanism and consequently making it somewhat more reliable.
In addition, the appearance of the weapon and it's material construction differs vastly from the TKB-022. While both weapons are made out of synthetic materials, the M42 is made of materials similar to that find in the P90, which are both inexpensive, light weight, and relativley strong.
The weapon sports of number of "cosmetic" differences, including different iron sights, picanty rails, and a specifically designed grenade luancher attachment area, although in theory any grenade launcher with picanty rails can be attached.
The weapon also uses a surefire muzzle break, and an impact gel recoil pad to help reduce and control recoil.
The weapon also uses a helical stacked drum magazine, to both increase the amount of ammunition held and decrease the size of the magazine. The magazine composition is mostly of a translucent poly synthetic material used in the XM8 or G36 type magazines. While complicated, and somewhat less reliable, the magazine is capable of supporting a large amount of ammunition in a compact, relativley small amount of space. Generally speaking, the magazines are machine loaded, to improve reliability and function, and each round is generally coated in a neoprene sleeve like in the P90, although they can be used in their regular forms at decreased reliability.
In addition, the weapon uses an integrated round counter and a LCD lighting unit capable of being placed on either side, that can have the light turned on and off. In addition, the scope can be linked with the round counter, to provide accurate round numbers even when looking through a scope.
The weapon uses a polygonal 5 groove 1: 8.75 inch (222.5mm) right hand turn cobalt-alloy "flow formed" barrel; the barrel is made of an alloy that contains more than 50 percent cobalt. The barrel is roughly 13% heavier than standard steel barrels, but is more erosion and corrosion-resistant and is designed to retain high strength during long-term exposure to high temperatures. Cobalt alloys are frequently used in the aerospace industry, such as the hot-gas section of turbine engines. A proof of concept M240 7.62mm x 51mm NATO barrel, in practice, had 24,000 rounds test-fired through it, causing it to reach temperatures of 1,100 degrees, without failure. A steel barrel would have failed under such treatment.
The barrel itself, combined with polygonal rifling, in use with the M42 is extremely durable, and has a minimum 30,000 round barrel life, although it is possible to extend this or get use out of the rifle after the minimum is reached.
