18" Midlength 6mm ARC Medium M-LOK Upper Assembly

18" 6mm ARC Medium Midlength M-LOK Upper Assembly Advanced ballistics meet meticulous build quality. The 18" 6mm ARC M-LOK Upper Assembly is built for precision shooters looking to maximize the potential of the 6mm ARC cartridge. Featuring a nitrided medium-profile barrel, midlength gas system, and 1:7 twist, it offers superb accuracy and smooth cycling. Assembled with a steel nitrided gas block, American-made M-LOK handguard (style may vary), and mil-spec forged upper, this upper is tuned for consistency and reliability. Components are torqued with AEROSHELL 33MS and secured using Permatex 242. BCG and charging handle not included. Backed by a Limited Lifetime Warranty and a Sub-MOA Guarantee. Specifications Barrel Finish: Nitride / Melonite Barrel Profile: Medium Cartridge: 6mm ARC Barrel Length: 18" Gas System: Midlength Twist Rate: 1:7 BCG / Charging Handle: Not Included Handguard: American-Made M-LOK (style may vary) Origin: Made in the USA