If you own an AR-15, there's a good chance you've spent serious money keeping it fed with 5.56 or .223. Between rising ammo costs, range fees, and limited practice time, a lot of shooters end up running their AR less than they'd like. That's where a .22 AR comes in — and once you try one, it's hard to imagine your collection without it.

Whether you're buying a dedicated .22 LR AR-15 or adding a dedicated .22 LR upper to your existing setup, here's why this configuration deserves a spot in your lineup.

1. Ammo Costs Next to Nothing

This is the big one. A box of 5.56 can run you up to a dollar a round depending on the market, while .22 LR is often a fraction of that cost — sometimes just pennies per round. If you shoot for fun, train regularly, or just like burning through a few hundred rounds on a Saturday, a .22 AR lets you do that without draining your wallet.

2. Nearly Recoil-Free Practice

New shooters, kids, and anyone working on fundamentals benefit enormously from a low-recoil platform. A .22 AR has virtually no kick, which means you can focus entirely on sight alignment, trigger control, and follow-through instead of fighting muzzle rise. It's one of the best tools for building real marksmanship skills before ever loading a centerfire round.

3. Same Manual of Arms, Real Familiarity

Because a .22 AR uses the same lower receiver, controls, stock, and general ergonomics as your centerfire rifle, every rep you put in translates directly. Reloads, safety manipulation, sight picture, and stance all carry over. You're not learning a "toy" — you're reinforcing the exact skills you'll use with your duty or defensive rifle, just at a fraction of the cost per trigger pull.

4. Great for Small Game and Pest Control

A .22 AR isn't just a range toy. It's a legitimately capable option for small game hunting and pest control around a property, offering accuracy and a familiar platform without the noise or overpenetration concerns that come with larger calibers.

5. Suppressor-Friendly and Quiet

.22 LR is one of the easiest and cheapest calibers to suppress, and subsonic .22 ammo paired with a can makes for an incredibly quiet shooting experience. If you've been considering a suppressor purchase, a .22 AR is often the ideal host to start with. One thing to keep in mind: because subsonic .22 LR loads produce less energy, they can sometimes struggle to reliably cycle a blowback action, so it's worth testing a few loads to find what runs consistently in your rifle. The upside is that since these actions run on straight blowback rather than a gas system, there's no gas port or gas key to adjust — the ammo you choose is what determines reliable cycling.

The CMMG-Style Bolt: The Backbone of Dedicated .22 LR Uppers

When you pick up a purpose-built .22 LR AR-15 upper or a complete dedicated rimfire AR, chances are it's running a CMMG-type bolt. This bolt design has become something of an industry standard, and you'll find variations of it used by a wide range of manufacturers (including Zaviar Firearms) building dedicated .22 LR uppers and complete rifles — not just CMMG itself.

Here's why this bolt design matters so much to how these rifles perform:

• Purpose-Built Blowback Function: Unlike a standard 5.56 bolt carrier group, a CMMG-type bolt is engineered specifically around the lower pressure and different operating cycle of rimfire ammunition, which is essential for consistent, reliable cycling.
• Proven, Widely-Adopted Design: Because so many manufacturers build around this bolt pattern, it's a well-tested and well-understood design with a long track record in dedicated .22 LR AR-15s.
• Durability: These bolts are built to handle high-volume rimfire shooting, which matters if you're using your .22 AR as a primary training tool.
• Consistent Compatibility: The widespread use of the CMMG-type bolt pattern across the industry means magazines, uppers, and accessories from different manufacturers are more likely to work well together.

A dedicated .22 LR AR-15 built around this bolt design gives you a rifle that feels, handles, and shoots like your centerfire AR — just far cheaper to run.

Final Thoughts: A Smart Addition to Any AR Owner's Lineup

A .22 AR isn't a replacement for your centerfire rifle — it's a force multiplier for it. More trigger time, lower costs, better fundamentals, and a genuinely fun shooting experience all come standard. Whether you go with a dedicated .22 LR AR-15 or add a dedicated .22 LR upper built around a CMMG-type bolt, you'll wonder why you didn't add one to your setup sooner.