RetroArms CNC Piston 19 Steel Teeth — SR25 Gearsets 19-tooth (T19) sector gear for

19-tooth (T19) sector gear for long-stroke piston systems

and SR25-length gearbox shell

and high-performance builds

making it ideal for AEG builds equipped with Electronic Trigger Units (ETUs) or MOSFET systems

RetroArms CNC Piston 19 Steel Teeth — SR25 Gearsets 19-tooth (T19) sector gear forThe RetroArms CNC Piston 19 Steel Teeth (SR25 Gearbox) is a high durability, precision engineered piston made specifically for SR25 and extended length AEG gearboxes. Built for long stroke DMR systems, it features a full rack of 19 CNC machined steel teeth designed to handle higher stress, longer travel, and stronger springs commonly used in designated marksman builds. Its reinforced polymer body combined with a steel tooth rack ensures exceptional