16″ 5.56 AR-15 Upper Receiver | 4150 CMV Nitride Barrel | 1:7 Twist | 15″ Rugged M-LOK Rail | 3 Prong OTx

Built for dependable performance and long-term durability, this Mid State Firearms 16″ 5.56 NATO upper features a 4150 CMV nitride barrel, 1:7 twist rifling, forged 7075-T6 upper receiver, lightweight 15″ Rugged M-LOK handguard, and an outside-threaded 3-prong flash hider compatible with Castle-style blast shields. Every upper is professionally assembled using quality components, and when ordered with a bolt carrier group, the complete assembly is test fired with that exact BCG to verify proper function before shipment.