6mm ARC (Advanced Rifle Cartridge) is a modern efficient cartridge (introduced 2020) designed to fit AR-15-pattern rifles, offering good long-range performance, light recoil, and versatility for target, varmint, and medium-game use.

6mm ARC, introduced by Hornady, was designed to deliver capable long-range ballistics from the compact AR-15 platform while keeping recoil light and efficiency high. It is used for target and long-range shooting, varmint and predator hunting, and deer-sized game within reasonable ranges. As a newer cartridge, ammunition is available but in a more limited selection and at higher cost than mainstream options. It suits AR-15 shooters wanting more reach and efficiency than 5.56 with light recoil.

General information about this caliber — not a recommendation for this specific firearm.