The Faxon FX-22 .22 LR Fluted Threaded Barreled Receiver (brand part no. FX22-BA-12B216N10FMQ-T) is a complete semi-auto upper assembly built by Faxon Firearms for AR-15 pattern rifles chambered in .22 Long Rifle. The 10.5 inch barrel is fluted to shed weight and features a threaded muzzle for a suppressor or muzzle device, giving shooters a dedicated rimfire upper that bolts straight onto a standard AR-15 lower. It is a low-cost, low-recoil way to add a dedicated .22 LR training or plinking upper to an existing AR-15 build, ideal for high-round-count practice without burning through centerfire ammunition.

Key Specifications

• Chambered in .22 Long Rifle for low-cost, low-recoil semi-auto shooting.
• Fitted with a 10.5 inch barrel, fluted to reduce weight for a faster-handling, front-light upper.
• Fluting also adds surface area for heat dissipation during sustained strings of fire.
• Muzzle is threaded for a suppressor or muzzle device.
• Built as a complete semi-auto barreled receiver, ready to install on a standard AR-15 lower.
• Operates on direct blowback, the standard operating system for dedicated .22 LR AR-15 uppers.
• Uses a dedicated, weighted blowback bolt distinct from a standard 5.56 bolt carrier group, sized to properly time .22 LR cycling.
• Ships as a barreled upper only, with no magazine included.

Frequently Asked Questions

Will this fit a standard AR-15 lower? Yes, it is built as a complete barreled upper receiver designed to install on any standard AR-15 lower receiver.

Is the muzzle threaded for a suppressor? Yes, the 10.5 inch fluted barrel has a threaded muzzle for a suppressor or muzzle device.

Is this considered a firearm on its own? No, an AR-15 upper receiver is not the regulated firearm component; the lower receiver is.

Buy the Faxon FX-22 .22 LR Fluted Threaded Barreled Receiver

Adding a dedicated rimfire upper is one of the best ways to rack up trigger time without the cost or recoil of centerfire ammunition, and this Faxon FX-22 upper drops onto your existing AR-15 lower in minutes. Order it from our Faxon Firearms lineup through our Lubbock, Texas gun shop for fast, insured direct shipping, and browse our full rifle parts selection for other upper options.