This BCM PKMR handguard is a direct replacement featuring a simple drop-in design. It is for a mil-spec, M4 type AR15 with a mid length gas system and mil-spec front sight base. The PKMR handguard has a slim and lightweight design and features reinforced KeyMod mounting surfaces for durable accessory support. This handguard also features an aggressive textured area for enhanced traction and has an aluminum heat shield to reduce heat transfer to the handguard and the shooters hand. This PKMR model will only fit a triangle M16 type handguard retaining cap. This mid-length model has a black finish.