T-N.T. Studio APS-X HOP-UP SYSTEM Precision Double I/D Air-cushion Inner Barrel For Marui MK23 GBB (132mm) Major Color_Transparent 20g Superior Perfect Hit 6mm

20g Superior Perfect Hit 6mm Bio BB (1600 rd)

Item Weight (gram) 65 Major Color Dark Earth Built Material High Density Nylon Package Includes 155mm Rail Grip x 1 pcs

- Lightweight duralumin cutout

Green fluorescent Metal Front & Rear Sight

Double O-Ring Design increase the air tightness of the cylinder

T-N.T. Studio APS-X HOP-UP SYSTEM Precision Double I/D Air-cushion Inner Barrel For Marui MK23 GBB (132mm) Major Color_Transparent 20g Superior Perfect Hit 6mmT N. T. Precision Double I D Air cushion Inner barrel only at the outlet of a large inner diameter. Therefore, gas envelope effect, part of the gas "coated" the BB, front guide airflow sharp and straight. Rear of BB's airflow is more strong some people think thatT N. T. Air cushion Directional Inner barrelis "whole branch is large inner diameter" the right answer is only front end ratio is the large diameter, not entire, the rear end of the inner