Sig Sauer MCX Air Gen 2 CO2 .177 Pellet Rifle, 18" Barrel, 30rd Mag, FDE, M-LOK Handguard, Flat Trigger, QD Stock, Flip-Up Sights

The Sig Sauer MCX Air Gen 2 CO2 .177 pellet rifle brings modern tactical ergonomics and proven semi-automatic reliability to precision air gun shooting. Built on the proven MCX platform, this Gen 2 update delivers improved accuracy and handling through a thoughtfully redesigned control layout. Whether you're zeroing a .177 air rifle for small-game hunting, backyard target work, or training at distance, the MCX Air Gen 2 combines the familiar manual-of-arms of modern sporting rifles with the accessibility and low-cost-per-shot economics of CO2 airgun shooting.

Chambered in .177 caliber with a rifled barrel and powered by standard 88g or 90g CO2 cartridges housed in the quick-detach buttstock, this rifle cycles 30 semi-automatic shots per magazine at up to 545 fps. The 18-inch barrel keeps the overall length to a trim 34.75 inches, making it easy to handle in tight shooting positions or transport. A flat-blade trigger, reduced-angle grip, and ambidextrous manual safety levers make the controls intuitive for shooters familiar with centerfire rifles. The M-LOK handguard accepts modern tactical accessories, so you can outfit it to your shooting style—whether that's adding optics mounts, tactical lights, or other gear.

Iron sights come standard: flip-up dual aperture peep sights adjustable for windage and elevation. The low-profile recoil pad and redesigned synthetic buttstock absorb what little recoil .177 pellets produce and keep you comfortable during extended shooting sessions. At 7.2 pounds, it's light enough for younger shooters or full-day field work, yet substantial enough to feel like a serious rifle. The FDE finish blends practical durability with a clean, modern aesthetic.

Feed it 5.0- to 8.5-grain pellets and you've got a reliable, quiet rifle that doesn't require licensing or the complexity of center-fire ammunition handling. Clean, accurate, and fun to shoot—the MCX Air Gen 2 proves that air rifle shooting can be as tactically refined as it is practical.

Key Features

• Semi-automatic operation: 30-round detachable magazine, rifled .177 barrel
• CO2 powered: quick-detach buttstock accepts 88g or 90g cartridges
• Modern controls: flat-blade trigger, reduced-angle grip, ambidextrous safety levers
• M-LOK handguard: accepts modern tactical rail systems and accessories
• Flip-up dual aperture peep sights: adjustable for windage and elevation
• Compact length: 34.75 inches overall, 18-inch barrel
• Lightweight: 7.2 pounds with low-profile recoil pad

Specifications

Frequently Asked Questions

What pellet weight should I use in the MCX Air Gen 2?

The rifle is optimized for pellets in the 5.0- to 8.5-grain range. Lighter pellets will shoot faster; heavier pellets will produce better accuracy and energy downrange. Experiment within this range to find what groups best in your rifle.

How many shots do I get per CO2 cartridge?

The quick-detach buttstock accepts standard 88g or 90g CO2 cartridges. Shot count varies with pellet weight, temperature, and shooting pace, but you'll typically get 30 good shots per magazine before power drops noticeably. Keep spare cartridges on hand for extended sessions.

Can I add a scope or red dot to this rifle?

The M-LOK handguard accepts modern rail systems and accessories. You'll need an appropriate optics mount to attach a scope or reflex sight to the handguard or upper receiver—the rifle does not come with a built-in optics rail or Picatinny system. Check mount compatibility before purchase.

Is this rifle suitable for small-game hunting?

Yes. The .177 caliber, rifled barrel, and up to 545 fps muzzle velocity make it practical for hunting small game like rabbits, squirrels, and similar quarry at reasonable distances. Always comply with local hunting regulations and use appropriate pellet weights for your game.