LBE Unlimited Ready Build Kit 13.7" Complete Upper Receiver, Black Melonite - AR137RBK

This is a complete upper receiver assembly kit for AR-15 platforms chambered in 223 Remington/5.56 NATO. It features a 13.7" cold hammer forged barrel with mid-length gas system, M16 bolt carrier group, A2 flash hider, and standard charging handle. The kit requires no gunsmith installation and comes ready to assemble to a compatible lower receiver.