Thursday, May 8, 2008

Heckler & Koch HK416

The HK416 is an assault rifle designed and manufactured by Heckler & Koch to be an improved version of the M4 Carbine pattern firearm. It is available as a complete firearm, or as an upper receiver kit that fits on any AR-15 type lower receiver. The US Army’s Delta Force collaborated with the German arms maker to develop the new carbine. It replaced its M4s with the H&K 416 in 2004 after tests revealed that the piston operating system significantly reduces malfunctions while increasing the life of parts.

The HK416 uses a proprietary gas system derived from the HK G36, replacing the direct impingement gas system used by the standard M16/M4. The HK system uses a short-stroke piston driving an operating rod to force the bolt carrier to retract. This design prevents propellant gases from entering the weapon’s interior, a traditional short-coming with direct gas impingement systems. The reduction in heat and fouling of the bolt carrier group increases the reliability of the weapon and extends the interval between stoppages. It also reduces operator cleaning time, and stress on critical components.

The HK416 is equipped with a proprietary accessory rail forearm with MIL-STD-1913 rails on all four sides. This allows all current accessories, sights, lights, and aimers used on M4/M16-type weapons to be fitted to the HK416. The HK416 rail forearm can be installed and removed without tools, using a bolt locking lug as the screwdriver. The rail forearm is of the 'free-float' variety; it does not contact the barrel. This allows for improved accuracy potential.

The HK416's barrel is cold hammer-forged. This allows the barrel to maintain its accuracy for over 20,000 rounds, with minimal degradation of muzzle velocity. The cold hammer-forging process also allows for improved operator safety during obstructed bore occurrences or after extended firing sessions. This includes "OTB" (Over-the-beach) capability; the HK416 can be safely fired after being submerged in water and not completely drained.

Saturday, May 3, 2008

Infantry Fighting Vehicle : FV510 Warrior

The Warrior family of tracked armoured vehicles, developed by Alvis Vickers Ltd (now BAE Systems Land Systems). A series of British armoured vehicles originally developed to replace the older FV430 series of armoured vehicles. The Warrior has the speed and performance to keep up with a Challenger 2 Main Battle Tank over the most difficult terrain, and the firepower and armour to support infantry in the assault.

Warrior delivers road speeds of 75km/h, and crosses rough terrain faster than most main battle tanks

Passenger access is through a single electric ram powered door at the rear of the hull, rather than a drop-down ramp as in the American M113 and M2 Bradley APCs. There are no firing ports in the hull, in line with British thinking that the role of the APC/IFV is to carry troops under protection to the objective and then give firepower support when they have disembarked. Another reason is that it is not possible to fire accurately out of the ports of a moving IFV and access to firing ports would require internal stowage to be moved from behind the seated soldiers in the rear of the vehicle.

The British Army using Warrior in operations in the Middle East

Warrior Section Vehicles are able to carry and support 7 fully-equipped soldiers together with supplies and weapons including a number of anti-tank weapons for a 48-hour battlefield day in nuclear/biological/chemical conditions. The protection against small arms, missiles, RPGs and anti-tank mines was proven during the UN operations in Bosnia. Additional (applique) armour, such as "cage armour" can be fitted.

A British Army Warrior with 30mm RARDEN cannon and image intensification sights

The Warrior is driven by a Perkins-Rolls-Royce V8 Condor engine through a 4 speed automatic gearbox. It is capable of a road speed of 46 mph (75 km/h) as well as incredible braking power. The fully rotating turret carries a 7.62 mm calibre coaxial chain gun machinegun alongside the conventionally powered RARDEN 30 mm cannon. Thales Optronics BGTI battle group thermal imaging sights have added to upgrade the night fighting capability. All Warrior vehicles are now equipped with BOWMAN radios for enhanced communications command and control.