Manufacturer :LG Defense Systems Inc.The Shrec AR-9 is the ultimate assault rifle chambered for the 6.5mm x 41mm 100gr caseless round using High Ignition Temperature Propellant (HITP). The weapons are designed with heavy fluted barrels to maximize sustained automatic fire and each internal part is coated with a molecular lubricant. Utilizes a 250 round disposable compact magazine housed in the buttstock of the weapon. Standard equipment includes a 40mm under barrel grenade launcher and electronic scope.
The weapon uses a 6.5mm x 41mm caseless ammunition, with the propellant shaped into rectangular shapes. The projectile is 6.5 mm in diameter with a case length of 41mm. The 6.5mm round is 70% the weight of a conventional 6.5mm Grendel round. The round also has similar ballistics to a 6.5 mm Grendel round, but the 6.5 mm HITP caseless has a higher muzzle velocity due primarily to the characteristics and formulation of the HITP propellent. That increased velocity gives the round a lbs ft of energy rating of 2418.
The weapon has two firing modes: semi-auto and full-auto at 750 rounds per minute. The loading and feed mechanism is physically very complicated but exceptionally fast and reliable.
1. As the cocking handle on the side is rotated clockwise by the weapon operator:
2. A round is dropped into the revolving chamber vertically (a loading piston assists this process).
3. The mechanism is then pulled forward by the return spring rotating the chamber 90° until it is lined up with the barrel. This completes the chambering of the round and charging of the electronic firing pin.
4. When the trigger is pulled, an electronic firing pin ignites the primer, which then ignites a powder booster charge that pushes the bullet into the barrel. The solid block of propellant is broken up to increase the ignition surface area and ignites, accelerating the bullet out of the barrel.
5. As the projectile is accelerating up the barrel, recoil forces drive the barrel, chamber and operating mechanism rearwards within the weapon, dissipating energy for single shot and fully automatic modes.
6. Gas tapped off from the barrel rotates the chamber and actuates the loading mechanism then rotating the chamber back to the vertical original position until it is lined up with the feed mechanism and the process repeats.
Because the Shrec uses caseless ammunition there are no extraction and ejection steps. If a round fails to fire the rifle can be manually unloaded by twisting the cocking handle counterclockwise. This pushes the failed/training round out an emergency ejection port on the side of the rifle and loads the next round.
When the rounds are fired, the barrel, chamber and operating mechanism recoils back against recoil springs several inches. Only when it strikes the buffer at the back of the rifle does the user feel the recoil. The rifle only loads and fires one round per movement of the internal mechanism. When the barrel and mechanism reaches the rearmost point in it's travel, the recoil springs push it forward back into its normal forward position. This movement also powers a plunger based generator that powers the electronic firing pin. The cocking lever is used to manually charge the firing pin
To avoid cookoff of caseless rounds a denatured hexogen propellant with a special binder and coating for the ammunition has increased the spontaneous ignition temperature to 371 °C (700 °F). This HITP round is fired by a patented electronic firing pin that sends a small electrical current to cause detonation of the primer which provides the thermal impulse necessary to ignite the propellant which then deflagrates, producing pressure. For added safety and efficiency during prolonged automatic fire we have incorporated a fluted barrel design in the AR-9. The fluted barrel will definitely dissipate heat quickly. This is due to the heat being allowed to reach the outside temperature at a faster rate by removing materials.
Our patented AC-3 Dry Lubricant system is used to coat all internal parts and the barrel. AC-3 is the controlled atmospheric application of a
proprietary formulated, modified tungsten disulfide. When the tungsten disulfide is applied in lamellar form through our precision process it forms a thin, uniform coating that forms a molecular bond with the substrate, and will not chip, flake or peel. It is inert,inorganic, non-toxic, non-corrosive and resistant to most petrochemical fuels, solvents and acids. Yet it is compatible will all wet lubricants.
Weight: 4.57kg
Length: 725mm
Barrel length: 460 mm
Rate of fire: Single shot, full auto at 750 rpm
Muzzle velocity: 3300 ft/sec (1005.8 m/s)
Energy: 2418 fpe (3288 joules)
Effective range: 914.4 meters
magazine: 250 round Disposable compact magazine, waterproof, reloadable, no magazine spring
accessories 40mm Grenade launcher, range 800 m