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Ships within 48 hours · Estimated delivery Aug 9 - Aug 14
This is an external upgrade part—ensure the rest of your build’s ergonomics and internals align with the upgraded component
making it ideal for AEG builds equipped with Electronic Trigger Units (ETUs) or MOSFET systems
Engineered for competitive players and custom builders
19-tooth (T19) sector gear for long-stroke piston systems
and high-performance builds
RetroArms CNC Piston 19 Steel Teeth — SR25 Gearsets This is an external upgradeThe 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