The 22 ARC (Advanced Rifle Cartridge) brings exceptional power and performance, elegantly packed into a compact cartridge that fits into your AR-15. The 22 ARC was engineered to use modern, high-BC bullets. Designing the cartridge and chamber in unison provides consistent accuracy, great velocity spreads and an outstanding shooting experience. Faxon Firearms set out to package their barrels for this exciting new cartridge. The Faxon Ascent 16" or 24" Complete 22 ARC Upper Receiver Group is backed by Faxon's Lifetime Guarantee. Faxon Ascent 16" or 24" Complete 22 ARC Upper Receiver Group: 22 ARC Rifle Length Gas System Faxon Enhanced Mfg: Faxon Firearms