Bravo's KMR Alpha is constructed of aluminum with a hardcoat anodized finish for corrosion resistance and is free-floating. Its 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 Type Handguard Finish Anodized Series Handguard Features Keymod Material Aluminum Positions 4 Firearm Type Rifle Firearm Model AR-15 Free Floating Yes