300 aac blackout (7.62X35) (including subsonic)

[doublearon]

Did i mention that this round was specifically created for the ar platform? I need to read up on that spectre whats it cost per round?

Reeds makes ammo for it. Teppo Jutsu developed it, and builds uppers for it. Cases are formed from 10mm Magnum cases. CH4D makes dies.