The Sons of Liberty Gun Works Patrol Upper Receiver is a reliable and rugged upper for serious AR-15 users. It is compatible with standard AR-15 lower receivers and chambered in 5.56 NATO. The SOLGW Patrol Upper features an 11.5"-16" barrel made from chrome-moly vanadium steel with a QPQ nitride treatment to ensure corrosion resistance and extended service life. The barrel features a carbine to mid-length gas system that provides smooth cycling and reduced recoil. The upper includes the Magpul SL handguard, with a Picatinny rail for mounting rifle scopes, lasers, lights, or grips in the most popular M-LOK standard. The upper receiver is high-quality 7075-T6 aluminum and anodized for enhanced durability. A pinned low-profile gas block adds to the reliability, ensuring consistent performance even under demanding conditions. The SOLGW bolt carrier group is top quality, allowing the shooters to focus on precise aiming and fast target switching. Besides the Picatinny system that makes them optic-ready, the Patrol uppers also feature factory-installed A2-style front sights and Magpul M-BUS rear sights, giving them more flexibility for various shooting scenarios.