Dye UL - S Barrel Back .688 Autococker Black Polished Airsoft Gun Cases & Backpacks This is due to imperfections

This is due to imperfections in the sealing surface of the valve body

Spring Included

Included with the SMG

More consistent performance over AA batteries

12 inch j&j ceramic barrel

Dye UL - S Barrel Back .688 Autococker Black Polished Airsoft Gun Cases & Backpacks This is due to imperfectionsDYE Barrels set the standard for accuracy and quality nearly 25 years ago and continue to do so today. DYEs new UL S Barrel back gives you more control and more accuracy with an extended 7. 9 inch control bore. The UL S control back uses multi stage precision honing, the most accurate and consistent finish available in paintball, eliminating ball spin, and improving accuracy. Self aligning two piece construction ensures properly centered assembly