The Reptilia Handguard features patented turn buckle technology and 10.5" M-LOK configuration in FDE finish designed for compatibility with all M4 upper receivers.Reptilia Handguard - 10.5" M-LOK FDEBillet 7075-T6 Aluminum ConstructionMIL-STD Type III Class 2 Hard Anodize finishPatented turn buckle technologyAR-15/M4 upper receiver compatibleIncludes required barrel nut and hardwareMade in the USAThis premium handguard offers durability and modularity for tactical applications competition shooting and custom AR-15 builds with professional-grade construction and finish.