Includes: Cylinder, Cylinder Head, Piston Head, Air Nozzle
Questions & Answers
Bore up kits are designed for guns upgraded with an M130 spring or higher. In order to take full advantage of the powerful spring bore up kits have larger cylinders and air nozzles, which allows more air to power the BB.
Manufacturer: Classic Army
Package includes: bore up cylinder, bore up cylinder head with double O-rings, silent piston head with ball bearings.