Built for shooters who want maximum performance with minimum weight, the Faxon ION Series Upper Receiver combines an ultra-light profile barrel with premium Faxon components- centered around the Faxon Enhanced Forged Upper Receiver, a carbon fiber handguard, and a Faxon patented adjustable gas block for tuning across ammo types and setups. This configuration includes an ambidextrous charging handle for fast, confident manipulation. FeaturesION-Series lightweight build designed for fast handling and reduced front-end massPencil 5.56 barrel for an excellent balance of weight and capabilityFaxon Patented Adjustable Gas Block for optimized function and smoother recoil impulseCarbon Fiber Handguard for rigidity with minimal weightFaxon Gunner Lightweight 5.56 Bolt Carrier Group to keep the entire system moving fast