Made with precision SUS304 Stainless Steel coating Increases accuracy for tighter groupings when firing AEG airsoft rifles Compatible with most most airsoft AEG rifles Tight bore 6.02mm inner diameter for accuracy and precision Recommended for standard AK74 length AEGsSpecifications: Brand Maple Leaf Build Stainless Steel Inner Barrel Diameter 6.02mm Inner Barrel Length 470mm 1X Inner Barrel