6.8 SPC was designed to give greater firepower for CQB (Close Quarters Battle) than the standard 5.56mm round. An M-16 chambered in 6.8 SPC can fire a 115 grain bullet at a velocity of 2,850fps.
The 6.8 SPC is based upon the 30 Remington case and is 43mm long, which is almost the same length as the standard 5.56x45mm round.
The 6.8 SPC round is designed to be fired in AR15/M16/M4 rifles fitted with a replacement upper receiver.
6.8 SPC ammunition can be fit into existing AR15/M16 magazines, with slightly reduced magazine capacities. Feeding problems are common, and 6.8 SPC magazines are recommended.
Rifles Chambered for 6.8 SPC Ammunition
Barrett manufactures the Barrett M486, which is a 6.8 SPC rifle based on the AR15/M16/M4 design.
Mid-South Tactical Network sells two version of a 6.8 SPC upper receiver.
6.8 SPC Magazines
PRi sells 6.8 SPC magazines in 5, 10, 15, and 25 round capacities.
6.8 SPC Ammunition
6.8 SPC ammunition is currently available from:
6.8 SPC Ammunition Performance
Specifications for 6.8 SPC ammunition performance are available from these ammunition manufacturers:
6.8 SPC Reloading Dies
Redding Reloading sells 6.8 Remington SPC Reloading Dies.