Sig Sauer115729013
Sig Sauer AIRMCX177G2BLK CO2 Air Rifle - .177 Caliber, Semi-Automatic, Tactical Black$199.99
Availability: In Stock
Current Stock: Out of stock
The Sig Sauer MPX GEN II is a CO2-powered .177 caliber air rifle built on a proven platform and refined for better accuracy and handling. If you're looking for a semi-automatic air rifle that delivers consistent performance on the range or in the backyard, this is a modern tactical-style shooter that combines Sig's reputation for quality with practical features you'll actually use. The Gen II updates—a redesigned buttstock, improved controls, and an M-LOK handguard—make this feel more like a true rifle, not just a pellet gun.
Fed by a 30-round magazine and powered by 88g or 90g CO2 cartridges housed in the quick-detach buttstock, the MPX Gen II delivers up to 450 fps with pellets in the 5.0–8.5 grain range. That's reliable velocity for target work and small-game airgun hunting. The rifled barrel supports accuracy, while the dual-aperture flip-up peep sights get you on target without batteries or mounting rings. A 7-pound trigger and ambidextrous manual safety levers round out the shooter-friendly design. At 25.75 inches overall and 6.2 pounds unloaded, it balances pointability with control.
The M-LOK handguard accepts standard accessories, and the Picatinny rail lets you add optics if the iron sights don't suit your needs. This is an air rifle for shooters who want semi-automatic firepower, a modern ergonomic platform, and the reliability to trust it for regular use—whether you're developing marksmanship, training, or just enjoying trigger time without centerfire noise and recoil.
| Caliber | .177 pellet |
| Action Type | Semi-Auto |
| Operating System | CO2 |
| CO2 Cylinder Size | 88g or 90g |
| Magazine Capacity | 30 rounds |
| Optimal Pellet Weight | 5.0–8.5 grains |
| Muzzle Velocity | Up to 450 fps |
| Trigger Weight | 7 pounds |
| Overall Length | 25.75 inches (654 mm) |
| Weight (without magazine) | 6.2 pounds (2.8 kg) |
| Sights | Folding dual-aperture peep (windage/elevation adjustable) |
| Handguard | M-LOK system |
| Accessory Rail | Picatinny |
| Stock Type | Synthetic with quick-detach design |
The rifle ships with one 30-round pellet magazine. You'll need to supply your own 88g or 90g CO2 cartridges.
Yes. The Picatinny rail supports standard optics mounts. The flip-up sights fold down if you want to run a scope, and the M-LOK handguard accepts compatible accessories as well.
The MPX Gen II is optimized for pellets between 5.0 and 8.5 grains. Staying within this range will give you the best accuracy and performance.
At up to 450 fps with the right pellet, this .177 air rifle is viable for small-game hunting where legal. Check your local regulations—some areas restrict air rifle use for certain game or require specific energy thresholds.
SKU: 115657691 • Width: 10in • Height: 3.6in • Depth: 20in • Weight: 7oz
Availability: In Stock
Current Stock: Out of stock
The Sig Sauer MPX GEN II is a CO2-powered .177 caliber air rifle built on a proven platform and refined for better accuracy and handling. If you're looking for a semi-automatic air rifle that delivers consistent performance on the range or in the backyard, this is a modern tactical-style shooter that combines Sig's reputation for quality with practical features you'll actually use. The Gen II updates—a redesigned buttstock, improved controls, and an M-LOK handguard—make this feel more like a true rifle, not just a pellet gun.
Fed by a 30-round magazine and powered by 88g or 90g CO2 cartridges housed in the quick-detach buttstock, the MPX Gen II delivers up to 450 fps with pellets in the 5.0–8.5 grain range. That's reliable velocity for target work and small-game airgun hunting. The rifled barrel supports accuracy, while the dual-aperture flip-up peep sights get you on target without batteries or mounting rings. A 7-pound trigger and ambidextrous manual safety levers round out the shooter-friendly design. At 25.75 inches overall and 6.2 pounds unloaded, it balances pointability with control.
The M-LOK handguard accepts standard accessories, and the Picatinny rail lets you add optics if the iron sights don't suit your needs. This is an air rifle for shooters who want semi-automatic firepower, a modern ergonomic platform, and the reliability to trust it for regular use—whether you're developing marksmanship, training, or just enjoying trigger time without centerfire noise and recoil.
| Caliber | .177 pellet |
| Action Type | Semi-Auto |
| Operating System | CO2 |
| CO2 Cylinder Size | 88g or 90g |
| Magazine Capacity | 30 rounds |
| Optimal Pellet Weight | 5.0–8.5 grains |
| Muzzle Velocity | Up to 450 fps |
| Trigger Weight | 7 pounds |
| Overall Length | 25.75 inches (654 mm) |
| Weight (without magazine) | 6.2 pounds (2.8 kg) |
| Sights | Folding dual-aperture peep (windage/elevation adjustable) |
| Handguard | M-LOK system |
| Accessory Rail | Picatinny |
| Stock Type | Synthetic with quick-detach design |
The rifle ships with one 30-round pellet magazine. You'll need to supply your own 88g or 90g CO2 cartridges.
Yes. The Picatinny rail supports standard optics mounts. The flip-up sights fold down if you want to run a scope, and the M-LOK handguard accepts compatible accessories as well.
The MPX Gen II is optimized for pellets between 5.0 and 8.5 grains. Staying within this range will give you the best accuracy and performance.
At up to 450 fps with the right pellet, this .177 air rifle is viable for small-game hunting where legal. Check your local regulations—some areas restrict air rifle use for certain game or require specific energy thresholds.
SKU: 115657691 • Width: 10in • Height: 3.6in • Depth: 20in • Weight: 7oz