16" 5.56 Phosphate Carbine M-LOK Government Upper Assembly

16″ 5.56 Phosphate Carbine M-LOK Government Upper Assembly

The 16″ 5.56 Phosphate Carbine M-LOK Government Upper Assembly delivers dependable, sub-MOA performance using carefully selected components and meticulous assembly practices. Built around a forged mil-spec upper receiver, this upper includes a 16″ mag phosphate-finished barrel with a Government/SOCOM profile—designed to strike a perfect balance between strength and maneuverability.

This upper features a low-profile steel gas block, rather than a budget-friendly aluminum one, and pairs it with American-made M-LOK handguards (style may vary). The carbine-length gas system ensures reliable cycling, and the included nitrided A2 flash hider is among the best in class. Key parts are installed using Permatex 242 threadlocker and AEROSHELL 33MS anti-seize grease to ensure consistent torque specifications and long-term functionality.

While the BCG and charging handle are omitted, this upper is ready to pair with your favorite components and is backed by a Limited Lifetime Warranty. It also comes with a Sub-MOA Guarantee when using quality match-grade ammo and proper shooting technique.

Specifications

• Barrel Finish: Mag Phosphate
• Barrel Profile: Government / SOCOM
• Cartridge Compatibility: 5.56 NATO
• Barrel Length: 16″
• Gas System Length: Carbine
• Twist Rate: 1:8
• BCG / Charging Handle: Not Included
• Handguard: American-Made M-LOK (style may vary)
• Muzzle Device: Nitrided A2 Flash Hider
• Made in the USA

Whether you’re building your first AR or upgrading a duty-ready rifle, this upper assembly delivers the durability, accuracy, and value Black Rifle Depot is known for.