A military laser that could give the UK military greater accuracy and cost only £10 per shot could be ready for British personnel to use in five years.The DragonFire Laser Directed Energy Weapon (LDEW) is a line-of-sight weapon and can engage with any visible target, according to the Defence Science and Technology Laboratory (Dstl).It destroys targets with an intense beam of light and has pinpoint precision and can hit an object the size of a £1 coin from a kilometre away.