Rimfire rifle planning · editorial reference

FX22 Threaded Barreled Receiver: Planning a 10/22-Style Rimfire Host

A barreled receiver is the starting point of a rifle, not a finished one. Here is how to think about the project before you spend anything.

Short answer

The FX22 is a 16-inch fluted, threaded .22 LR barreled receiver in the 10/22 pattern. It is the serialized core of a rifle, so it transfers like a firearm. Plan the rest of the parts around the stock, trigger group and magazines you want, and verify the thread spec for your suppressor.

What you are actually buying

The FX22 threaded barreled receiver is, according to the listing, a .22 Long Rifle barreled receiver with a 16-inch fluted barrel that is threaded for a muzzle device. Retailer listings for Faxon Firearms' FX22 describe a nitride-finished barrel and a receiver built to the Ruger 10/22 pattern, which is the same footprint that a huge range of third-party stocks, triggers and magazines are made for.

That is the whole product. No stock, no trigger group, no magazine. If you read "barreled receiver" and imagine a rifle in a box, adjust your expectations.

The legal basics of a barreled receiver

Under federal law the receiver is the part treated as the firearm. A barreled receiver includes it, so it is serialized and moves through a licensed dealer the same way a complete rifle would. In practice that means shipping to an FFL, filling out the usual transfer paperwork, and meeting your state's rules, including any waiting periods or restrictions that apply to rifles in your area. Do not assume a "parts" listing escapes any of that. Ask your dealer how they handle it before you order.

Also remember: the parts you add are typically not regulated, but the finished rifle still has to comply with your state's laws on stocks, magazines and features. California, for example, regulates semi-auto rifles in ways that other states do not, so check where you live before you plan.

Planning the rest of the rifle

Rather than a shopping list of specific products, here is how to think about each decision. Every item should come from a maker whose documentation you have read.

Stock. The stock sets the rifle's weight, length and personality. A slim sporter-style stock keeps a suppressed .22 light and handy. A heavier target-style stock adds stability but also weight at the back, which can balance a suppressor on the front. Check that the stock is designed for the barrel profile you have: a fluted 16-inch barrel with a can on it has different needs from a standard tapered barrel.

Trigger group. This is where many 10/22-pattern builders spend their effort, because the trigger is the part you feel. Different groups have different safety layouts and compatibilities. Follow the maker's installation instructions, or have a qualified gunsmith do the work. We do not provide assembly instructions here.

Magazines. 10/22-pattern rifles accept a wide range of magazines, from compact 10-round to large capacities. Reliability varies by magazine and ammunition, so buy a few from reputable makers rather than one large lot. RimfireAmmo has a good rundown of rimfire magazines and loaders.

Optic and mounting. A 16-inch .22 is a natural fit for a simple red dot or low-power scope. Make sure the receiver offers the mounting method you want, and confirm optic height against the stock you pick.

Ammunition. Semi-autos are fussy. Plan on trying a few subsonic and standard-velocity loads, and see our subsonic ammo by caliber page for what "subsonic" actually means.

The suppressor side

The listing tells you the barrel is threaded. It does not tell you your suppressor will fit without checking. Do this before you finalize the project:

Get the thread pitch from the maker's documentation. Retailer titles for Faxon threaded 10/22 barrels list 1/2x28, which is a very common rimfire pitch, but your specific receiver's documentation is the authority. Our thread pitch cheat sheet explains the common options.
Choose a suppressor rated for .22 LR use, and read its manual for host requirements.
Make sure you will have a thread protector on the muzzle when no suppressor is attached.

The suppressor itself is its own purchase with its own legal process. Federal law on that changed in 2026 and states vary; our buying walkthrough lays out the questions in order. This site does not publish instructions for manufacturing, modifying or assembling suppressors, and none of what is above should be read as a substitute for the can maker's own instructions.

Who a project like this suits

A barreled-receiver project makes sense if...	A complete rifle may suit you better if...
You already know which stock, trigger and magazines you want	You want to order once and shoot
You enjoy the research and the tinkering	You prefer a factory warranty on the whole rifle
You want a threaded barrel on a 10/22-pattern action	You are happy with a ready-made threaded .22
You are comfortable working with a dealer or gunsmith	You do not want to coordinate multiple orders

If you want something already assembled, our reviews of the Kel-Tec SU22 and the X-Ring Takedown vs GSG-16 cover finished rimfire hosts.

Hearing and eyes

A suppressed .22 is quieter, but it is not quiet in the sense of "no protection needed." Keep hearing and eye protection in your routine. Our piece on why a suppressor is not hearing protection explains why.

Bottom line

The FX22 is a sound foundation if you want to build a rifle around a threaded 10/22-pattern barrel and you already have opinions about everything else. Treat it as the start of a plan, check the thread pitch, work through a dealer, and let the finished rifle be shaped by choices you have actually researched.

Editorial note: This is an independent editorial overview built from manufacturer specifications and publicly available information. We have not performed hands-on testing of the products discussed, and nothing here is a performance guarantee. Verify specifications, compatibility and legality for your own situation.

Frequently asked questions

Is a barreled receiver a firearm?

The receiver is the part federal law treats as the firearm, and a barreled receiver contains it. In practice it ships to a licensed dealer and goes through the usual transfer paperwork. Confirm the process with your dealer.

Does the FX22 fit 10/22-pattern parts?

Retailer listings describe it as a Ruger 10/22-pattern barreled receiver. Parts compatibility can vary by maker, so check the manufacturer's compatibility notes for any stock, trigger group or magazine.

Do I need to modify the FX22 to use a suppressor?

The listing describes a threaded barrel, so it is intended to accept a muzzle device. You still need the thread pitch from the maker and a suppressor designed for it. This site does not give instructions for modifying firearms or suppressors.

Is a rifle project cheaper than buying a complete rifle?

It depends on the parts you choose, and a project can end up costing more than a complete rifle. Decide based on the rifle you want to end up with, not on a guess about savings.