M4 Carbon Fiber Barrel Black Carbon Fiber:Blue Compatible only with the Turbine

Compatible only with the Turbine Pro Regulator

Quick change spring system

All the BBs you need with none of the noise from a Hi-cap magazine

Barrel Nut Inside Diameter : 1

Full facial coverage that extends below the neck and can convert to a neck gaiter

M4 Carbon Fiber Barrel Black Carbon Fiber:Blue Compatible only with the TurbineLiquidation Sale on Select Versions shown in pics are 8in This is a M4 receiver spec carbon barrel very commonly used in SpeedQB and competition guns. Comes in 6,7,8,9,10,12 inches in length at no additional charge. Colors of the picatinny rail can be changed to anything offered by Cerakot red, blue, black, silver, green, gold, etc etc all available for $5 per picatinny rail purple is $10 Compensator can be included for $15 as well as changed to any