AA CNC Aluminum Cylinder for AEG (200-400 mm) - Nitroflon Precision-engineered by Action Army, this CNC-machined cylinder delivers optimized air compression for AEG rifles with inner barrels between 200–400 mm. Constructed from 6061 aluminum with a nitroflon-coated interior, it minimizes friction while the smooth bore ensures consistent performance. External CNC grooves facilitate efficient heat dissipation during sustained fire. Designed for demanding builds, this cylinder maintains reliability under high-stress use. Pair with compatible Action Army internals and account for BB weight relative to piston mass to achieve ideal volume ratios and prevent joule creep. Tested for durability across varied configurations.