08-30-2017, 08:09 PM
LRRPF52 Wrote:Not familiar with that cartridge.
There's a Czech 7.62x45.
300 AAC Blackout is 7.62x35. Maybe you meant that and had a double typo.
5.56 NATO does very well out of 11.5" barrels, and 10.5" with the right projectile.
The 300 Blackout (BLK) is a .30 caliber bullet in a .223 Rem case
The articles by one of the members of this group on PDWs has stated that the goal is to have a weapon that can hit out to 200m with a 5" barrel. Thus 9mm or any other current pistol round is not going to meet the standards.