Phase 5 handguard lo-pro slope nose 15" m-lok for ar-15 black FEATURES:-Developed to accommodate the features of our 7.5" LPSN quad rail to a longer 15" version-M-LOK is a modualr locking accessory mounting system that is direct attachmentmethod for hard mounting accessories to a negative space mounting point-Slender lightweight design, longer nose, ease of installation & superior construction& finish quality are some of the features that were designed into this system