Built using CNC machined aluminum Anodized coated finish increases durability and glossiness Stainless locking pin further secures mag base in place Compatible with Marui Hi-Capa magazines 10x14 dot matrix allows easier means of marking magazines In the Box 1X Magazine Base Specifications: Brand COWCOW Build Aluminum Compatibility Most Hi-Capa Magazines Color RED California Proposition 65 Warning: Cancer and Reproductive Harm - www.P65Warnings.ca.gov