The Faxon Ion is an ultralight 5.56mm AR-15 featuring Faxon's pencil-profile barrel and a lightweight carbon fiber handguard, targeting shooters who want a sub-5-pound AR-15 without a custom build. Type: Rifle Action: Semi-Automatic Caliber: 5.56x45mm NATO Capacity: 30 Year introduced: 2019, USA Weight: 54 oz Overall length: 32" Status: Active Intended use: Hunting, Tactical