Features - Lightweight aluminum alloy construction - Lowers buffer tube height - Allows usage of most optics on M4 Rifles while wearing a face mask or face guard - Choose from one of 2 buffer tube positions for your preferred height - Wiring can still be funneled through the base - Aluminum buffer tube included Manufacturer: Laylax / Prometheus Specifications: Compatibility: Most common Airsoft M4 Series AEGs. Requires receiver attachment point to be no more than 25mm long for proper fitment Material: Aluminum Alloy 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