Features CNC machined aluminum alloy construction Designed to offer a superior air seal over the factory cylinder head and air nozzle Drop in factory upgrade component Manufacturer: Prometheus / Laylax Specifications: Compatibility: Most version 6 AEG gearboxesMaterial: Aluminum alloy, polymer About Prometheus / Laylax Providing products in the Japanese market for the better part of 20 years, Laylax is well known for their high manufacturing quality and precise tolerances. Their tried and true parts and accessories have led them to be the leader in Japanese airsoft engineering.