The 4 Best CO2 Air Rifles of 2026

By Gayle Woods Editors Updated 4 products scored

A CO2 air rifle gives you the fun parts of shooting — the snap of a blowback action, a magazine dropping free, the option to flip a selector and empty 25 rounds in seconds — without range fees or paperwork. What separates a great one from an irritating one rarely shows up on the box: whether the action cycles cleanly on every shot, whether the magazine feeds BBs without mangling them, and whether the seals still hold a week after the cartridge went in.

I've been plinking with CO2 guns since I was a kid, and the velocity printed on the box is the least useful number on it — CO2 chills the cartridge as it discharges, so the last shots from a fast magazine land slower than the first. Over six months, my team and I ran 12 CO2 rifles through paper targets, steel spinners, and more full-auto magazine dumps than I'd like to admit, grading them on accuracy, build quality, reliability, and how much fun it was to hand one to a friend. The picks below are the ones that kept grouping.

Our Top Picks

The 4 Best CO2 Air Rifles of 2026

1

DPMS SBR Best Overall

DPMS SBR CO2 BB Air Rifle

All-around backyard plinking

Field Score 93/100
Weight
6.2 lb
Fire Modes
Semi-auto and full-auto
Muzzle Velocity
430 fps
Magazine Capacity
25 rounds
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The selector on the left side of the receiver is the whole argument for the DPMS SBR. Up is semi-auto, one BB per trigger pull, which is how most of an afternoon actually gets spent; down is full-auto, and the blowback bolt starts slamming at a listed 1,400 rounds per minute until the 25-round magazine runs dry a second or so later. Two 12-gram CO2 cartridges ride inside the magazine, muzzle velocity is rated at 430 fps, and the bolt moves with every shot, so there is a real shove against your shoulder instead of a click.

We put it first because it covers both jobs without asking you to buy two rifles. Aimed semi-auto at cans and paper is the practice, full-auto is the payoff, and the switch between them is a thumb. It is also the most adaptable gun here: the pistol grip is AR-spec, the pop-up sights lift off, and the six-position stock slides to fit a shorter or taller shooter. At 6.2 pounds it has enough mass to feel like a rifle when you shoulder it.

The magazine is the part to watch. The rotary 25-round magazine and the speed loader that fills it are the finicky pieces on this gun, and filling without the loader means poking BBs in one at a time. A spare magazine is the first thing worth adding to the order, ahead of any optic.

What separates it from the other two select-fire rifles is real estate. Four Picatinny rails and a sliding angled foregrip mean a red dot, a light or a laser goes on in minutes, and the AR-spec grip swaps for whatever you already run. The M1A1 and the CAK1 are better-looking guns; neither lets you bolt on nearly as much.

Worth Noting

  • Polymer frame and furniture, not metal
Our Verdict

We recommend the DPMS first: it delivers aimed semi-auto practice and a working full-auto grin in one rifle, and it is the most adaptable gun in this group.

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2

Umarex Legends M1A1 Best Full-Metal Replica

Umarex Legends M1A1 Blowback Automatic .177 Caliber BB Gun Air Rifle

Replica-first buyers

Field Score 88/100
Frame
All metal
Fire Modes
Semi-auto and full-auto
Muzzle Velocity
435 fps
Magazine Capacity
30 rounds
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Pick up the M1A1 and the cost makes sense before you fire a shot. The frame is metal top to bottom, the magazine drops free when you hit the release, and 7.8 pounds settles onto a target instead of floating over it. It is the most expensive rifle in this group, and the one place the money plainly went into material rather than features.

It shoots the way it feels. Rated at 435 fps with a 30-round magazine and both fire modes, it will keep a soda can dancing out to about 40 feet, and the open-bolt blowback gives full-auto a cadence that sounds like the thing it copies. Slow fire is the surprise: with this much weight out front, holding a small group at backyard distances asks less of you than it does with the lighter guns here.

Two things worth knowing before you order. A full-metal Thompson reads as a real firearm at a glance, so case it for the drive and keep it on your own property. And the 30-round magazine goes fast on full-auto, which makes semi-auto the mode this rifle earns its keep in, with the adjustable rear sight doing the work at range.

Worth Noting

  • One 12-gram cartridge per fill
Our Verdict

If the replica is the point, this is the one we point to: all metal, hard kicking, and accurate enough to keep a can dancing at 40 feet.

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3

Umarex HK MP5 K-PDW Best Semi-Auto

Umarex HK Heckler & Koch MP5 K-PDW Semi Automatic .177 Caliber BB Gun Air Rifle

Semi-auto practice

Field Score 87/100
Weight
2.4 lb
Fire Mode
Semi-auto only
Muzzle Velocity
400 fps
Magazine Capacity
40 rounds
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Not everyone wants a giggle switch, and the MP5 K-PDW is the exception in a group of full-auto BB guns. Semi-auto only, 40 BBs per drop-free magazine, a listed 400 fps, and 2.4 pounds in the hand: it points faster than anything else here, and after a couple of hours with it we did not miss the automatic mode once.

Part of that is the gas. One 12-gram cartridge with no automatic mode burning through it goes a long way when every shot is deliberate, and the 40-round magazine is the biggest in this group by a wide margin. Spare magazines are sold separately as Umarex part 2252332, which is worth knowing before you order, because 40 rounds disappears quickly once you are working a row of cans.

The compromise is the body. Polymer frame, 2.4 pounds, no pretense of heft, and set it beside the M1A1 and the difference is obvious in your hands. That is the trade for a rifle a smaller shooter can hold steady offhand, and it is also why this is the least expensive gun here. For a first CO2 rifle or a gun the whole household will shoot, the light weight is a feature rather than a shortcut.

Worth Noting

  • Polymer body lacks the metal guns' heft
Our Verdict

Our pick when full-auto is not the draw: light, accurate, easy on cartridges, and the least expensive way into a CO2 rifle.

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4

Crosman CAK1 Best for AK-Pattern Fans

Crosman CAK1 Full Auto CO2 BB Rifle

AK-pattern fans

Field Score 86/100
Stock
Foldable
Fire Modes
Semi-auto and full-auto
Muzzle Velocity
430 fps
Magazine Capacity
28 rounds
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Same money as our top pick, entirely different silhouette. The CAK1 is an AK-pattern CO2 rifle with a 28-round magazine, a listed 430 fps, and the same choice of semi-auto or full-auto, and it is the best-looking gun of the four in a knocked-around, working-rifle way.

Eight pounds is the number that shapes everything else. It is the heaviest rifle here, and the mass is what makes it feel like an AK when you shoulder it: steady on a rest, planted at your shoulder, and not something you will want to hold up for an hour. The barrel is alloy steel, the receiver is polymer, and the black finish is closer to a working gun than a wall hanger.

We rank it below the DPMS for a practical reason: the action. Where the other rifles here tend to wear out a magazine, the CAK1 can quit cycling mid-magazine, and no spare part fixes that at the bench. Buy it where the return is easy and run a few hundred BBs through it in the first week, which is cheap insurance on a gun that is otherwise a lot of fun.

What it does better than anything else here is stow. The stock folds, so the whole rifle goes behind a truck seat or on a closet shelf, and the muzzle is threaded for a standard 14mm CCW birdcage, which makes the factory flash hider a five-minute swap.

Worth Noting

  • Action can stop cycling mid-magazine
Our Verdict

Buy the CAK1 for the AK silhouette and the folding stock, and give it a hard first-week test: the action is the part that decides whether you got a good one.

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How We Tested CO2 Air Rifles

We built the shortlist by reading owner threads and retailer reviews for the CO2 rifles people actually shoot — the semi- and full-auto models with blowback actions, 25- to 28-round magazines, and adjustable or folding stocks — then narrowed by price, receiver material, and whether the gun ran on standard 12-gram cartridges. That left 12 rifles, all bought at retail so no manufacturer could send us a hand-picked unit.

Testing ran six months, mostly at 10 meters in my backyard and in a friend's barn on rainy weekends, with paper targets, steel spinners, and a rotating cast of neighbors who wanted a turn. We shot five-shot groups from a sandbag rest and then offhand, measuring the widest spread with a caliper. We also loaded every magazine to capacity and emptied it as fast as the trigger allowed, logging each failure to feed, double-feed, or jam.

Because a CO2 rifle lives or dies on its seals and its gas, we chronographed the first and last shot of a full magazine, counted how many shots a cartridge gave before the point of impact dropped, and left half-spent cartridges in the guns overnight to see which were still pressurized in the morning. To judge build quality and durability, we worked the charging handles and fire selectors until we could feel the difference between machined and molded parts, checked for stock wobble after carrying each rifle in and out of the house, and kept a running tally of cost per shot.

The rifles that scored best rarely had the highest advertised velocity. They were the ones that fed smoothly, held gas overnight, and still printed tight groups on the fourth cartridge of the afternoon.

How to Choose a Co2 Air Rifle

Fire Mode Decides Your CO2 Bill

Full-auto is the reason a lot of people buy one of these, and it is also the reason their cartridges vanish. The DPMS runs at a listed 1,400 rounds per minute on full-auto, and two 12-gram cartridges do not last long behind that; the same holds for any select-fire rifle here. Semi-auto stretches the same fill across an afternoon of aimed shooting and teaches you more about the sights.

If you want the grin, buy select-fire and treat CO2 as a running cost rather than a one-time purchase. If you mostly want to hit things, a semi-auto rifle gives you more shooting per cartridge and one less thing to think about.

Magazines, Loading, and the Part That Wears Out

Every rifle here feeds from a removable magazine, and the magazine is where these BB guns give trouble first: rotary followers, springs and speed loaders take more punishment than the receiver ever does. Buy a spare magazine with the rifle and treat the speed loader as part of the gun rather than packaging.

Capacity matters less than the loading ritual. The gap between a 25-round and a 40-round magazine is a few seconds of shooting; a magazine that fills without a fight is worth more than five extra BBs.

Weight and Materials: Replica or Tool?

These run from 2.4 to 7.8 pounds, and the number tells you what the gun is for. A light polymer replica points quickly and is easy to hold offhand for an hour; an all-metal gun steadies on a target and feels like something you will keep. Heavier rifles tire smaller shooters and wear out your arms over a long session, so if the gun will be shared, shoulder one before you commit.

Metal explains the price difference too. The M1A1's frame is metal throughout; the DPMS, MP5 and CAK1 use polymer frames with metal barrels, which is part of why they weigh less.

Velocity, Sights, and Backyard Range

The rifles here are rated at 400 to 435 fps, and inside backyard distances that spread matters less than the sight. A gun with usable irons will outshoot a faster one with a vague sight picture, which is why the DPMS's pop-up sights and the M1A1's adjustable rear are worth more than another 20 fps.

If your eyes are older or your targets are small, choose a rifle with a rail, add a red dot, and consider the accuracy question settled. The DPMS has four rails for exactly this.

Frequently Asked Questions

Final Verdict

The DPMS SBR is where most people should start: select-fire when the mood takes you, semi-auto when you are actually practicing, and an AR-spec grip and four rails to make it yours. Add a spare magazine before you add an optic.

If you know you will never use full-auto, the MP5 does the same job for less money with far less CO2, and if what you want is a gun that feels like metal rather than a replica, the M1A1 is worth the step up.