Features High Flow Design for Optimum Power Output One-Piece Anodized Aluminum Frame High Compression O-Rings Stainless Steel Valve Internals Manufacturer: Nine Ball / Laylax Specifications: Compatibility: Umarex / VFC GLOCK Series and Other Compatible Gas Blowback Airsoft PistolsMaterial: Aluminum 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.