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Star Y-05
STAR Y-05 01
Type Anti-materiel rifle
Place of origin Euskadi
Service history
In service 2005-
Used by Euskadiko Indar Armatuak, Ertzaintza
Production history
Designer STAR
Designed Early 2000's
Manufacturer STAR
Produced 2005-
Variants AMR 2005
IWS 2012
Specifications
Weight 14 kg
Length 1800 mm
Barrel length 1200 mm

Cartridge 14.5 mm (AMR 2005)
15.2 x 169 mm (IWS 2012)
Action Long recoil Rotating bolt
Muzzle velocity 1,450 meters per second
Effective range 1,800 meters
Maximum range 2,600 meters
Feed system 5-round detachable box magazine
Sights 10x Telescopic sight

The Star Y-05 IWS 2012 is an Euskadi's semi-automatic anti-materiel rifle, produced by STAR. IWS stands for Infantry Weapon System. It is actually a amoothbore weapon, like many modern tank guns, and not a true rifle but this can help accelerate projectiles and increase ballistic effectiveness. It fires a 15.2 x 169 mm armor piercing fin stabilized discarding sabot round (207 mm long), and is the first man-portable rifle to use this type of ammunition.

The first variant of the weapon was the Star Y-05 AMR 2005. AMR stands for Anti-Materiel Rifle. It uses a 14.5 mm armor-piercing fin-stabilized discarding sabot round (200 mm long). The projectile is a solid tungsten fin-stabilized dart with a body diameter of 5.56 mm.

Other variants are expected with the weapon still being under development.

Mechanism

This rifle is based on a nine-and-three-quarter inch long recoil mechanism. This mechanism, usually found in shotguns, helps manage the heavy recoil forces of the 15.2 mm EXAL APFSDS round due to its damping effect that allows for force distribution over a longer period of time. Another unusual feature of this weapon is the movement of the barrel. After firing, the barrel recoils into a shock-absorbing hydro-pneumatic sleeve much like those found on a LG 1 Mark II 105 mm Howitzer. The Y-05 IWS 2012 also uses a multi-baffle muzzle brake to distribute muzzle energy and further reduce recoil, similar to the ones used on D-30 2A18M 122 mm Towed Howitzers. The entire rifle body is made up of a combination of high-tension plastics and superlight polymers to increase manageability and cut down on weight. The smoothbore barrel is easily detached and packed away for increased mobility. The five-round box magazine is inserted on the right of the rifle at a 45-degree downward angle.

The projectile

The projectile is a 15.2 mm fin-stabilized discarding-sabot type with armor-piercing capability which the Y-05 IWS 2012 was specifically designed to fire. It contains a dart-shaped penetrator of either tungsten carbide or depleted uranium, capable of piercing 40 mm of rolled homogeneous armor at a range of 1,000 m, and causing secondary fragmentation. The cartridge consists of a plastic case, a steel head, and a plastic sabot shell around the penetrator.

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