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SIG MCX Air Rifle

SIG MCX Air Rifle

Best price now

$394.00at AmazonObserved at 12:31 PM

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Our take on the SIG MCX Air Rifle

The SIG MCX Air Rifle is a CO2-powered, semi-automatic .177 caliber pellet rifle styled after the SIG MCX carbine. It fires from a 30-round pellet magazine at up to 545 fps and comes with a 1-4x24 scope and M1913 accessory rail. It weighs 7.86 lb and runs on 88g or 90g CO2 cylinders. At $199.99 at eBay as of November 4, 2026, it is the only new price shown across 2 stores, so there is no recent range to compare against.

Best forBackyard plinkers who want a semi-auto repeaterShooters who want an AR-style trainer without firearm costs
Scope-ready target practice at short range
Pros
  • Semi-automatic action with a 30-round pellet magazine
  • 1-4x24 scope included
  • M1913 rail for adding accessories
  • Realistic MCX-style synthetic stock and controls
  • Up to 545 fps in .177 caliber
Cons
  • 7 lb trigger pull is heavy for precision work
  • CO2 power fades in cold weather and as the cylinder empties
  • 88g/90g cylinders cost more per shot than bulk CO2
  • 7.86 lb is heavy for a pellet rifle
  • Velocity drops with rapid semi-auto fire

SIG MCX Air Rifle prices at every store

  • AmazonNew

    Availability unknown

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    $394.00+ $5.00 shippingObserved at 12:31 PM
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Also available at

  • eBayCheck price at eBay

SIG MCX Air Rifle price history

Lowest price we've seen: $394.00 on Nov 4 at Amazon. Tracked across 1 store since Nov 4.

Specifications

Action Type
Semi-AutoSource
Operating System
CO2Source
Caliber
.177 calSource
Sights
1-4x24 ScopeSource
Stock Type
SyntheticSource
Mags Included
(1) 30rd Pellet MagSource
Overall Length
34.75 in (883 mm)Source
Trigger Weight
7 lb (31 N)Source
Muzzle Velocity
up to 545 fps*Source
CO2 Cylinder Size
88gr, 90grSource
Weight
7.86 lb (4 kg)Source
Accessory Rail
M1913Source

Questions and answers

Is the SIG MCX Air Rifle worth it at $199.99?
At $199.99 at eBay as of November 4, 2026, you get a semi-auto CO2 repeater with a scope included. That is fair for an AR-style plinker, but budget for CO2 cylinders, which add to the running cost.
How many shots do I get from one CO2 cylinder?
It uses 88g or 90g cylinders, which typically give a few hundred shots depending on temperature and rate of fire. Semi-auto firing and cold weather both cut that number.
Does it come with a scope and magazine?
Yes. The package includes a 1-4x24 scope and one 30-round pellet magazine.
Is it accurate enough for target practice?
It is a plinker, not a match rifle. The 7 lb trigger and CO2 velocity variation limit precision, but it holds useful accuracy at short backyard distances with the included scope.
Can I use it in cold weather?
CO2 pressure drops in the cold, so velocity and shot count fall. It works best in warm conditions.
What is the difference from a .22 caliber air rifle?
The .177 caliber shoots faster and flatter but with less energy, and pellets are cheaper. A .22 caliber air rifle hits harder for hunting and pest control.
Where is the SIG MCX Air Rifle cheapest?
At Amazon, for $394.00, as of our latest check.
Where can I buy the SIG MCX Air Rifle?
2 stores we checked sell it, including Amazon, eBay.

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Buying guides that pick the SIG MCX Air Rifle

  • Best pellet guns for target practice and pest control