ASG Ultimate Cylinder - For Inner Barrel 201-251mm Rails is perfect for those who

is perfect for those who want to rain down 100's of BB on their enemies at once

just like the M4A1

The EPM1-RX internal shell is distinguished by Its grey color and EPM1-RX markings on its surface

Directional venting makes sure your voice is projected and allows for breathability

ASG Ultimate Cylinder - For Inner Barrel 201-251mm Rails is perfect for those whoConstructed from solid steel with an attractive ribbed external finish. These high performance cylinders are surface treated to ensure minimal friction between the piston and cylinder wall. Super smooth bore lining. This is a ported cylinder, suitable for 201 251mm barrel lengths. Suitable for nearly all V2, V3, V6, V7 gearboxes. Exceptions can apply to certain brands. View our entire range of ULTIMATE parts here.