Howa Mini Action 223 Heavy Barreled ActionNEW! Howa Mini Action . 223 Heavy Barrelled Action. Chamber and bolt are 12% shorter than regular short actions with shorter bolt throw for faster reloads. 20" drawn steel barrel, three position safety and H. A. C. T. two stage trigger. Factory equipped with a ten round, synthetic detachable magazine. Lightweight and Fast! Action Type Mini Calibres 223 Rem (1 9" twist) Barrel Length 20" Magazine Capacity 10+1 in chamber Barrel Contour #6