As one who studiously avoided the ground whenever possible I have a question for those with experience of battle. A chum of mine was decrying the 5.56mm round used in the SA80/2, claiming a lack of lethality was built into the original American idea of wounding on the (Vietnam) battlefield, thereby tying up soldiers to deal with their injured comrades. The AK47, meanwhile is designed to kill first time, it leaves a much bigger wound on exit. Is it true that GPMG is still in use in Afg? If so, why? Does it go through mud walls and the like? Anyone care to comment on the lethality or otherwise of SA80? The 5.56 has been described as a cold war weapon, designed to be lightweight so that lots of rounds can be carried. Is it time to now consider reverting to the old NATO standard of 7.62mm? Or this ultra modern version; Barrett M468 6.8mm Semiautomatic Rifle The weapon for delivering the new 6.8mm Remington cartridge is basically an AR15 / M16 / M4 rifle, with a few added features. Barrett calls the new rifle the M468 [it has not been type classified], and is being built in both a civilian-legal model, and also in a close quarters battle (CQB) configuration. Complete rifles or the upper conversion units are available. The Barrett M468 leaves the performance of the 5.56mm for others to ponder. The M468 can be utilized by law enforcement, military, and civilian shooters. The performance of the 6.8mm Remington SPC far surpasses that of the 5.56 mm.