BCM PKMR (Polymer KeyMod Rail) Features Direct replacement handguard featuring simple drop in design. For mil-spec M4 type AR15 s with a carbine length gas system and mil-spec front sight base. Natural ergonomics slim comfortable and lightweight (only 5.6 oz). Aggressively textured area for enhanced traction. Reinforced KeyMod interface for durable accessory support. Three six-hole KeyMod mounting surfaces (10:30 1:30 and 6:00). Aluminum heat shield reduces heat transfer to the handguard and shooters hand. The PKMR will only fit a round carbine type handguard retaining cap. BCM PKMR (Polymer KeyMod Rail) Specifications Made in the USA Carbine Length Flat Dark Earth KeyMod Interface Drop-in design Lightweight