inbar lambda smart 03 for hicapa & G series carbon steel best accurate

Nickel-plated high strength Carbon Steel6.03mm diameter bore made to exact tolerances within 10 micron accuracy (+0.01mm)45 degree angle window cutHigh polish with precision crownMade in Osaka, JapanLambda #39;s #34;SMART #34; line of inner barrels provide a precise and cost-effective solution for Airsofters who want to improve their gun #39;s efficiency and accuracy without breaking the bank. Lambda #34;SMART #34; barrels are made from nickel-plated carbon steel, precision cut, crowned, and polished with 10-micron accuracy. Manufacturer: Lambda Specifications:Length: 133mm Inner Diameter / Bore: 6.03mm (+0.01mm) Material: Nickel-plated Carbon Steel Compatibility: For Tokyo Marui other compatible Airsoft GBB