In the most basic of applications the KeyMod system allows for universal modularity between various manufacturers of accessories, and accessory rails. A big win for the trigger puller. As the industry advances the modular accessories will mount directly to the KeyMod instead of picatinny, allowing for a lighter, cleaner, and less bulky weapon system.Features: Manufactured from aluminumIt is lightweight yet durableA proprietary patent pending mounting, indexing and lock up system that mitigates 12 rail movement under heat generated from the barrel nutThe KMR Alpha is hardcoat anodized for corrosion resistance as well as to maintain a non-reflective finishThe BCM KMR Alpha also allows for a larger range of modularity offering 4 different offset mounting positions between traditional 3,6,9 and 12 positionsHandguard flares forward (towards muzzle end) at the 3 and 9 O'clock positions approximately 1/4 inches