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The .22 ARC has quickly become one of the more talked-about cartridges for AR-15 shooters who want reach without stepping up to a bigger frame, and Rise Armament built this upper to get the most out of it. It centers on an 18-inch 416R stainless steel barrel that's fluted, button-rifled, and air-gauged with a 1:7 twist. That twist rate is the SAAMI spec for a reason, since it's what stabilizes the long, heavy-for-caliber bullets the ARC was designed around, from 62-grain varmint loads up to the 88-grain match projectiles. The muzzle is threaded 1/2×28 and finished with an 11-degree target crown, so adding a suppressor or brake is straightforward.
The cartridge itself was engineered to fit, feed, and function from a standard AR-15, using the same magazine footprint as 6.5 Grendel and 6mm ARC. It's often described as delivering something close to .22-250 performance from a semi-auto platform, and the 18-inch barrel here hits a sweet spot where the ARC really shines without the long, heavy tubes those older varmint rounds usually need. Whether you're ringing steel at distance, working prairie dogs, or setting up for coyotes, this upper gives you a flat trajectory and light recoil that makes follow-up shots easy.
The barrel rides inside a 15.25-inch free-floating skeletonized aluminum handguard with a continuous 12 o'clock Picatinny rail, M-LOK slots along the sides and bottom, four threaded QD sling swivel inserts, and a snag-free front. A patent-pending attachment lock helps the rail hold zero. Rise finishes the package with a rifle-length gas system for a smooth cycle, a premium bolt carrier group featuring a 9310 bolt that's individually MPI tested with a staked gas key and black nitride coating, plus their ambidextrous charging handle. The Patriot Brown Cerakote gives it a clean, field-ready look that pairs nicely with a range of lowers.
It ships as a complete upper with the barrel, handguard, bolt carrier group, and ambidextrous charging handle already assembled. You just mount it to any standard mil-spec AR-15 lower and you're set. You will still need a .22 ARC compatible magazine, which uses the same footprint as 6.5 Grendel and 6mm ARC.
The .22 ARC was designed around long, high-BC bullets in the 62 to 88 grain range, and the 1:7 twist is the SAAMI spec that stabilizes them properly. The 18-inch length gives you strong velocity and downrange performance without needing the 24 or 26-inch barrels older .22 varmint rounds typically require. It hits a nice balance of reach and handling for a gas gun.
Yes, the barrel is threaded 1/2×28 with an 11-degree target crown, so it accepts common brakes, flash hiders, and suppressors. That thread pitch is standard for the .22 caliber world, giving you plenty of options. The rifle-length gas system also helps keep things running smooth when you add a can.
It's a flat-shooting cartridge that works well for long-range target and steel, varmint and predator hunting, and it holds enough energy downrange for medium game at moderate distances. Many shooters compare its ballistics to the .22-250 while running from a standard AR-15 platform. Recoil is minimal, which makes spotting your own hits and staying on target easy.
| UPC | 850043415923 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | RA-22ARC-CU-BRN-18 |
| Action | |
| Barrel Finish | Black Cerakote |
| Barrel Length | 18" |
| Caliber/Gauge | .22 ARC |
| Color | Patriot Brown |
| Length | 18'' |
| Product Type | Upper |
| Shipping Weight | 5.63 |
| Style | Complete |
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