Description: Lancer Tactical Slotted Cylinder For Mid Length Barrels The SHS premium stainless steel full seal cylinder provides an airtight seal with SHS piston and cylinder heads, designed for Version 2 Gearbox AEGs. A fully sealed cylinder provides more air volume for propelling BBs through longer AEG barrels, and provides a consistent muzzle velocity. By replacing your ported cylinder with a full sealed SHS cylinder, you can also increase the muzzle velocity of your stock AEG! Performance upgrade cylinders allow for better air compression, ultimately leading to more power for your AEG. Typically, replacing a stock cylinder with an SHS upgraded cylinder will allow for an increase of 10-40 FPS in shooting performance.