A 22 ARC complete upper is a rifle component assembly that contains the barrel, bolt carrier group, and handguard as a single unit, ready to attach to a lower receiver.

The 22 ARC (Advanced Rifle Cartridge) is a centerfire rifle round designed to split the difference between .223 Remington and larger cartridges like 6.5 Creedmoor. A complete upper means you get everything above the lower receiver—the part that houses the trigger and fire control group—assembled and ready to use. You buy or build a lower receiver separately, connect the upper to it, and you have a functional rifle.

The appeal is straightforward: a complete upper saves you the work of sourcing and assembling individual parts like the barrel, bolt, charging handle, and rail system. For someone building their first rifle or adding a new caliber to their collection, it cuts the complexity in half. You do not need a gunsmith or specialized tools for the final assembly step.

Key Takeaways

  • A 22 ARC complete upper includes the barrel, bolt carrier group, handguard, and charging handle as one assembled unit that bolts onto a lower receiver.
  • You still need to source a lower receiver separately, as federal law treats it as the regulated "firearm" part of the rifle.
  • Complete uppers are sold by rifle manufacturers and aftermarket parts makers, with prices typically ranging from $400 to $900 depending on barrel length and component quality.
  • Assembly requires only a pivot pin and takedown pin—no special tools or gunsmith work—and takes less than five minutes.
  • 22 ARC ammunition is less common than .223, so check local availability and online pricing before committing to the caliber.

What comes inside a 22 ARC complete upper

A complete upper includes the barrel (usually 16 to 20 inches for rifle builds), the bolt carrier group (the moving parts that chamber and fire the round), the handguard (the rail or tube you grip), the charging handle, and the gas tube or piston system that cycles the action. Some uppers also include a muzzle device—a brake or flash hider—already installed.

What you do not get is the lower receiver, which is the part the federal government regulates as the "firearm." You must buy that separately, and depending on your state, you may need to go through a licensed dealer or pass a background check. The lower is where the trigger, hammer, and safety live.

Quality varies widely. Budget complete uppers ($400–$600) often use mil-spec parts and basic finishes. Mid-range options ($600–$800) may include better barrels, coatings, or ergonomic upgrades. High-end uppers ($800+) typically feature match-grade barrels, premium bolt carriers, or specialized handguards designed for accuracy or modularity.

How to attach a complete upper to a lower receiver

Assembly is straightforward enough that most first-time builders can do it without tools beyond a punch or Allen wrench. The upper and lower are held together by two pins: the pivot pin (at the rear, near the stock) and the takedown pin (at the front, near the magazine well).

The process takes about five minutes. You align the upper with the lower, insert the pivot pin from right to left, then the takedown pin. Some builders use a small punch to start the pins; others use their fingers. Once both pins are seated, the rifle is assembled and ready to function-test or shoot. Disassembly is the reverse.

No gunsmith work, no headspace gauging, no special equipment. The upper and lower are designed to mate with standard tolerances, so as long as both parts are from reputable makers, they will fit together reliably.

Where to buy a 22 ARC complete upper

Major rifle manufacturers like Aero Precision, Ballistic Advantage, and Faxon offer 22 ARC complete uppers through their own websites and through distributors like Brownells, MidwayUSA, and Palmetto State Armory. Smaller custom builders also sell them, often with more specialized barrel profiles or finishes.

Prices depend on barrel length, material, and finish. A 16-inch upper with a basic mil-spec bolt carrier and standard handguard might run $450–$550. A 20-inch match-grade barrel with a nickel-boron bolt and free-float handguard could be $750–$900. Some sellers bundle uppers with lower receivers as a "kit," which can save money if you are building from scratch.

Shipping is straightforward—uppers ship directly to your door in most states. Barrels are not regulated, so there are no dealer requirements. The lower receiver, when you buy it, will need to go through a licensed dealer in your state.

22 ARC ammunition and availability

The 22 ARC is newer than .223 Remington, so ammunition is less common and often costs more per round. Factory loads from makers like Hornady, Federal, and Sig Sauer are available through online retailers and some gun shops, but stock can be inconsistent. Expect to pay $1.00 to $1.50 per round for factory ammunition, compared to $0.40 to $0.80 for .223.

Reloaders can make their own 22 ARC rounds using .223 brass, which requires only a neck-sizing die and a slightly different powder charge. This brings the per-round cost down significantly if you reload in volume. However, if you do not reload and your local shops do not stock 22 ARC, you will be ordering online regularly.

Before buying a 22 ARC upper, check what ammunition is available in your area and what it costs. If you live somewhere with limited online shipping or prefer to buy locally, .223 or 5.56 NATO uppers may be more practical.

22 ARC ballistics and what it is designed for

The 22 ARC fires a .224-inch bullet at velocities between 2,700 and 2,900 feet per second, depending on barrel length and load. It sits between .223 Remington (which tops out around 3,300 fps with lighter bullets) and 6.5 Creedmoor (which runs 2,600–2,800 fps with heavier bullets). The result is a round that carries more energy than .223 at distance while using less recoil and cheaper ammunition than larger cartridges.

It was designed for hunting medium game (deer, hogs) and long-range target shooting where .223 is marginal. It is not a replacement for .223 in an AR platform—it is an alternative for shooters who want something in between. If you already shoot .223 and are happy with it, 22 ARC offers no advantage. If you want more power or longer-range capability without stepping up to a magnum, it fills a niche.

Frequently Asked Questions

Can I use a 22 ARC upper on any AR-15 lower receiver?

Yes. The 22 ARC upper uses the same mounting interface as any other AR-15 upper, so it will attach to any standard AR-15 lower receiver. You do not need a special lower or any modifications. The only consideration is that some older or very cheap lowers may have loose tolerances, which could cause the upper to rattle slightly, but it will still function.

Do I need to adjust anything when I switch between a 22 ARC upper and another caliber?

No. Because the upper and lower are separate, you can swap uppers freely without any tools or adjustments. If you own a .223 upper and a 22 ARC upper, you can use the same lower receiver with both. Just remove the takedown and pivot pins, swap the upper, and reinstall the pins. The lower does not care what caliber upper is attached.

Is 22 ARC legal everywhere?

The 22 ARC cartridge itself is legal in all 50 states for civilian ownership. However, some states restrict what you can hunt with, and a few have magazine or feature restrictions on rifles. Check your state and local hunting regulations before buying if you plan to hunt. For target shooting, there are no federal restrictions on the cartridge.

What is the difference between a 22 ARC upper and a 6.5 Grendel upper?

Both are intermediate cartridges designed for AR-15 platforms, but 6.5 Grendel is older and has more ammunition options. 22 ARC is newer, uses .223-compatible brass, and is slightly easier to reload for. Grendel has a larger bullet diameter and slightly more power. If ammunition availability matters to you, Grendel has the edge. If you reload or want a newer design, 22 ARC is worth considering.

How accurate is a 22 ARC complete upper?

Accuracy depends on the barrel quality and your shooting skill. A budget complete upper with a basic barrel will shoot 2 to 3 inches at 100 yards in the hands of a competent shooter. A match-grade upper can shoot 0.5 to 1 inch at 100 yards. Most shooters will see 1 to 2 inches, which is more than adequate for hunting or general target work.