Bravo's KMR Alpha is hardcoat anodized for corrosion resistance as well as to maintain a non-reflective finish. It is made of aluminum and is lightweight yet durable. The interface system was developed to work in parallel with the current picatinny system. This rail system allows for a larger range of modularity offering four different offset mounting positions between traditional 3,6,9, and 12:00 positions. Included is a BCM KeyMod sling mount .