In new condition. Features Include: Cut to work with most standard TM-Spec Airsoft AEG hop-up units Precision 6.03mm inner diameter Includes 60 degree hop-up bucking and nub Perfect as a drop-in installation to improve the accuracy and precision of your favorite AEG Durable brass construction with NITROFLON coating Manufacturer: Unicorn Airsoft Specifications: Length: 310mm Inner Diameter 6.03mm Bucking Hardness: 60 Degree Compatibility: For Tokyo Marui, G&P, Matrix and Other Compatible Airsoft AEGs Material: Brass, Rubber Package Includes: Barrel, Hop-Up Bucking, Hop-Up Nub Check my page to see if there is anything else you need! I will accept reasonable offers! I will combine shipping on multiple orders when possible! Follow or watch items for discounts!