Bore-Up Cylinder For MP5-A4/A5/SD5/SD6, G36C, SIG552

AEG Bore-Up Cylinder Type 3 for MP5-A4/A5/SD5/SD6, G36C, SIG552Stainless 304 material / 5 typesRibbed surface finish increases cylinder-surface-to-air area to thus increase heat dissipation.Fine inner surface finish enhances piston reciprocation. With large cavity to produce more air. Stainless steel construction with thin walls and smooth inside finish