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Lonex Enhanced SIG-551 Cylinder Set Aluminum Mushroom-Type Piston Head

[36028 / GC-04-06]
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Lonex Technology Co., Ltd was established in 1980 in Taipei, Taiwan. Supplying main plastic injection mold and molding OEM services. Their parts are widely used in auto accessories, electronics, household appliances, medical devices, game players, and computer display fields. In addition to designing and manufacturing of high quality airsoft guns, Lonex also offers OEM services for airsoft and firearms manufacturers. Their upgrade internal parts for airsoft guns have become legendary very quickly, and are committed to the best service and support for their customers.

The Lonex Enhanced Cylinder Set with a piston head is an affordable upgrade solution for providing better performance and maintenance for your airsoft gun. The mushroom type piston head is designed to help absorb force and reduce the noise in the gearbox. A steel ball bearing piston head allows for smoother rotation during spring compression. The steel cylinder is well built for heat dissipation. There is an o-ring on the air nozzle for better compression and air seal. Overall, this kit is perfect for repairing or improving your current airsoft gun build.

Manufacturer: Lonex
Model: Enhanced SIG-551 Cylinder Set Aluminum Mushroom-Type Piston Head
Package Includes: Piston Head, Cylinder, Cylinder Head, Nozzle
Warranty Length: 45 Days
Warranty Handler: Airsoft GI (Warranty Policy)


  • Grooved steel cylinders for heat dissipation
  • Steel ballbearing piston head for smoother rotation of spring during compression
  • Ventilation holes in piston head greatly increases speed that the piston travels for faster cycling
  • Rubber mushroom-type piston head helps absorb impact force & reduce noise
  • CNC processed polycarbonate air nozzle (w/ o-ring) for better air seal

Please Note:

  • Professional installation is recommended. Improper use or installation of upgrade parts are 99% of the time the cause of failures of these items.
  • Please thoroughly inspect any parts for defects before attempting installation. Due to the high possibility of damage from improper installation, we will not warranty parts after attempting installation.

Manufacturer: Lonex
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