20" 6mm ARC Medium M-LOK Upper Assembly

20" 6mm ARC Medium Rifle M-LOK Upper Assembly Engineered for accuracy, built for modern ballistics. The 20" 6mm ARC M-LOK Upper Assembly is a purpose-built platform for precision shooting and long-range performance. It features a premium nitrided barrel, rifle-length gas system, and medium contour for optimal harmonics with the 6mm ARC cartridge. Paired with a steel nitrided gas block, American-made M-LOK handguard (style may vary), and forged mil-spec upper, every component is assembled using Permatex 242 and AEROSHELL 33MS for long-term reliability. BCG and charging handle not included. Backed by a Limited Lifetime Warranty and Sub-MOA Guarantee with match-grade ammo. Specifications Barrel Finish: Nitride / Melonite Barrel Profile: Medium Cartridge: 6mm ARC Barrel Length: 20" Gas System: Rifle Length Twist Rate: 1:7 BCG / Charging Handle: Not Included Handguard: American-Made M-LOK (style may vary) Origin: Made in the USA