Our readers keep the lights on and my morning glass full of iced black tea. As an Amazon Associate, I earn from qualifying purchases.9 Best CO2 Air Rifle | Full-Auto Or Classic Lever Action

Check Price on Amazon

The Umarex Legends Lever Action is a faithful replica of the Winchester 1894, complete with a lever that ejects spent brass-like shells as you cycle it. It fires .177 steel BBs at 600 fps from two 12-gram CO2 cartridges housed in the stock, and the feed system loads 10 plus one in the chamber through a realistic side gate. Owners consistently report hitting 1.5-inch spinners at 25 yards with the adjustable rear sight, and the faux wood stock and metal receiver give it a heft that feels period-correct.

The shell-ejection mechanism is the star of the show — each cycle drops a shell a few feet away, adding immersion for plinking and reenactment sessions. The action is smooth out of the box, and the velocity is sufficient for punching paper and taking small pests at moderate range. Some users do note that the front sight can arrive damaged, and the plastic shell casings are easy to lose, but replacement packs are available.

Overall, this rifle delivers a unique shooting experience that no semi-auto replica can match. The lever action is addictive, the accuracy is respectable, and the build quality — aside from the occasional QC slip — holds up well for a CO2 gun in this range. It is the best choice for shooters who want the tactile rhythm of a classic cowboy gun without giving up modern CO2 convenience.

Check Price on Amazon

The Sig Sauer MCX Gen 2 is a semi-auto .177 pellet rifle built with a metal receiver and a real-feeling charging handle that punctures the CO2 cartridge with a single pull. The 30-round magazine lets you sustain fire drills without constant reloads, and the 18-inch rifled steel barrel produces the tight groups needed for taking raccoons, possums, and snakes at pest-control distances. Owners report that the weight and balance closely mimic the firearm version, making it a practical training tool.

Accuracy out of the box is excellent — some users land consistent hits on quarter-sized targets at 25 yards with standard lead pellets. The Picatinny rail system lets you mount any red dot or magnified optic, and the stock is adjustable for length of pull. The main drawback is the CO2 consumption: each 12-gram cartridge is spent before the 30-round magazine empties, so bulk CO2 or a PCP adapter is worth considering for extended sessions.

For anyone who needs a training rifle that translates directly to their centerfire Sig MCX, this is the most faithful option available. The all-metal build, crisp trigger, and rifled barrel make it a serious pest-control tool that happens to double as a competition-grade plinker.

Check Price on Amazon

The Umarex Legends MP Blowback is an all-metal replica of a classic submachine gun, firing .177 steel BBs in semi or full auto at up to 465 fps. The 52-round stick magazine gives you extended strings before reloading, and the blowback action cycles the bolt with each shot to deliver a satisfying physical kick. Users report that it runs reliably on two 12-gram CO2 cartridges, lasting roughly three magazines per pair with no jams even when using copper-coated BBs.

The all-metal construction gives it a heft that plastic replicas cannot match, and the 14mm CCW-threaded barrel accepts suppressors and tracer units for added immersion. The fixed front sight and elevation-adjustable rear sight are basic but functional for plinking out to 50 feet. The magazine loading tab can slip under tension, and the CO2 consumption is heavy in full auto, but the build quality is far above what the price suggests.

This is the best option for shooters who want the closest possible tactile experience to a real SMG without the legal hurdles. The full-auto fire rate is controllable, the accuracy is acceptable for a smooth-bore BB gun, and the metal parts give it a lifespan that plastic alternatives cannot match.

Check Price on Amazon

The Lancer Tactical Hydra is a full-size CO2 blowback rifle that fires .177 BBs in both semi and full auto, reaching 430 fps with standard steel BBs. The 25-round drop-out magazine is compatible with a separate replacement mag, and the five-position adjustable stock lets shooters dial in their preferred length of pull. The included fog-proof red dot sight with four reticle options adds significant value, especially at this price tier.

Owner reports highlight the impressive shot count per CO2 pair — over 125 BBs per two cartridges, which is excellent efficiency for a blowback rifle. The nylon-framed receiver keeps weight manageable while the alloy steel barrel maintains the structural rigidity needed for consistent barrel alignment. The functional bolt catch adds to the training realism, and the quad Picatinny rail system accepts any standard accessory.

The main trade-off is the 25-round magazine capacity, which empties very quickly in full auto. An extra magazine or two is almost required for extended sessions. For a mid-range budget, this rifle offers the best balance of realism, efficiency, and included accessories in the blowback category.

Check Price on Amazon

The DPMS SBR is a CO2-powered BB rifle that replicates the feel of an AR-15 short-barreled rifle, with a thumb selector for semi and full auto fire modes reaching 1400 rounds per minute. It uses two 12-gram CO2 cartridges housed in the magazine, producing blowback action that cycles the bolt with every shot. The six-position adjustable stock and quad Picatinny rails make it compatible with standard AR accessories like grips and foregrips.

Real-world accuracy is surprising for a full-auto BB gun — users report 1-inch groups at 30 feet in semi-auto, and the full-auto mode stays on target within a 2-inch spread at 25 feet. The CO2 efficiency is reasonable, with a single pair of cartridges lasting through six or seven 25-round magazines. The flip-up sights are functional but cheap, and most owners swap them for a red dot or laser to tighten performance.

The build quality is solid for the price, but the trigger has a two-stage feel with a stiff break that some shooters dislike. The barrel can loosen over time if over-torqued, and the firing pin is a known failure point on heavy-use units. For AR-style training on a budget, this rifle delivers the handling and function you need.

Check Price on Amazon

The Crosman CFAR1X is a select-fire CO2 BB rifle that toggles between semi and full auto with a thumb switch, delivering 430 fps from two 12-gram cartridges. The included red dot sight helps with rapid target acquisition, and the six-position adjustable stock combined with an AR-compatible pistol grip makes it feel like a military carbine. The blowback action cycles the bolt with each shot, adding to the training value.

Durability stands out — multiple owners report the rifle holds up well after a year of regular use with no internal failures. The full-auto fire rate is controllable with short bursts, and the rail system accepts all standard optics and accessories. The included red dot is serviceable for the price but not premium; upgrading to a better optic is common. The CO2 magazine design means you must insert a new cartridge into the magazine each time, so carrying spares is essential.

For the price, the CFAR1X delivers reliable full-auto function and a realistic form factor that will not break the bank. The trigger has a predictable break, and the finish resists wear well. Shooters who want an affordable trainer that can double as a fun plinker will find this to be a smart entry point.

Check Price on Amazon

The Beeman QB78S is a bolt-action, single-shot .177 CO2 rifle with a rifled barrel and an adjustable trigger — a rare combination at this price tier. Owners who have run chronograph tests report an average of 605 fps for the first 20 shots per cartridge, with some modifications pushing the velocity to 720 fps. Accuracy is excellent: quarters at 15 yards and 2-inch discs at 30 yards are routine with the open sights. The Picatinny rail allows easy scope mounting for precision work.

The rifle is quiet enough for backyard plinking and holds its accuracy even in 50°F temperatures, which is impressive for a CO2 gun. The stock is synthetic and feels basic, but the metal barrel and receiver give it a substantial weight of 5.8 pounds. The adjustable trigger is a standout feature — it allows you to dial in a crisp break that most budget air rifles lack entirely.

The main reliability concern is the factory O-rings, which can leak after a year or two. Replacing them with automotive-grade O-rings is a cheap, well-documented fix that restores the rifle to full function. For shooters who want a quiet, accurate, and repairable CO2 rifle on a tight budget, the QB78S is a proven platform.

Check Price on Amazon

The Gamo Swarm Magnum PRO is a gas-piston break-barrel rifle, not a CO2 gun, but it earns a place here because it fills a velocity gap that CO2 rifles cannot reach. The IGT Mach 1 gas piston drives .22-caliber pellets at 1650 fps, and the SWARM 10-shot inertia-fed magazine lets you fire multiple times without breaking the barrel. The Whisper Fusion sound reduction system keeps the report quieter than most magnum springers, making it suitable for pest control in suburban settings.

The included 3-9×40 scope is functional but low quality, with a narrow field of view and no parallax adjustment. Most owners replace it with a higher-end optic like a UTG 3-12X44. The cocking effort is substantial — around 41 pounds — so shooters with joint issues may struggle. The stock also has a mold line and a non-adjustable cheekpiece that feels too high for some shooters.

When paired with heavy, subsonic pellets, this rifle is devastatingly accurate at 35 to 50 yards. The gas piston delivers consistent velocity regardless of temperature, unlike CO2 guns, so it works in winter conditions. If your primary need is hunting power rather than training realism, this is the best option despite the switch away from CO2.

Check Price on Amazon

The Sig Sauer MCX Advanced bundle packages the full-size semi-auto CO2 pellet rifle with two 90-gram CO2 tanks and 500 lead pellets, giving you everything you need for extended range sessions out of the box. The rifle features an 18-inch rifled alloy steel barrel that chronographs at 640-650 fps with alloy pellets, putting it above most CO2 semi-autos for terminal energy. The 30-round magazine feeds .177 pellets reliably, and the included 1-4×24 scope gives you magnification for precision shots at distance.

The all-metal receiver and handguard make this the heaviest CO2 rifle on the list at over 8 pounds with a full CO2 tank, which translates directly to the handling of a real Sig MCX. Accuracy is excellent — owners report tight groups at 50 feet with lead pellets, and the adjustable trigger breaks cleanly. The 90-gram bulk CO2 tanks last for hundreds of shots, solving the 12-gram cartridge issue that plagues smaller CO2 rifles.

The main downside is the price, which sits firmly in premium territory. A minority of owners report jamming after 12 rounds, but most find the rifle flawless out of the box. For shooters who want the ultimate CO2 training rifle with bulk CO2 convenience and factory accuracy, this bundle is the top-tier choice.