Sig Sauer is a major firearms maker, and its air gun range copies the look and handling of its real rifles and pistols. The MCX and MPX CO2 rifles are the best known in the UK, and they are popular with shooters who want a tactical-style air rifle for plinking and practice.
Sig Sauer air guns for sale now
- Sig Sauer X-Five and P226 £300
- Sig Sauer MCX Virtus PCP £400
- Sig Sauer MCX Virtus PCP £550
- Sig Sauer mpx £210
- Sig mpx £180
- Sig Sauer MCX Rattler Canebrake plus Extras £500
See all 6 Used Sig Sauer Air Rifles for Sale UK →
The models worth knowing
Sig Sauer MCX and MPX
These CO2 air rifles are styled on Sig’s real MCX and MPX firearms. They use 88g or 90g CO2 cylinders and a 30-round belt-fed magazine for pellets. They are semi-automatic, so they fire one shot per trigger pull. They are fun and quick to shoot, though not as accurate as a good PCP.
Sig Sauer ASP20
The ASP20 was a high-quality break-barrel gas spring rifle with a very good trigger. It is no longer made, but used examples are well liked.
Sig Sauer P226, P320 and other CO2 pistols
Sig makes CO2 versions of its P226, P320, P365 and other pistols, firing pellets or BBs. In England and Wales, air pistols must shoot under 6 ft-lb to be held without a firearm certificate.
Sig Sauer Virtus
The Virtus is a PCP rifle built for fast semi-automatic shooting. It is less common in the UK.
Used Sig Sauer prices in the UK
These figures come from the asking prices in real FreeGunAds ads and update automatically.
| Model | Ads | Typical asking price | Usual range |
|---|---|---|---|
| MCX | 3 | £500 | £400 – £550 |
| MPX | 2 | £195 | £180 – £210 |
| Virtus | 2 | £475 | £400 – £550 |
| All Sig Sauer ads | 6 | £350 | £235 – £475 |
Based on 6 asking prices in FreeGunAds ads since 2025, updated automatically. These are asking prices, and condition, extras and power (12 ft-lb or FAC) all move the price.
What to check on a used Sig Sauer
- CO2 seals: fit a cylinder and leave it for a while to check for leaks.
- Belt magazines (MCX and MPX): check the belt is not damaged and feeds cleanly. Spare belts are worth having.
- Pistols: check the slide, magazine and safety all work.
- Accessories: red dots, scopes and spare magazines add value if they are included.
- Power: confirm the rifle is under 12 ft-lb and pistols under 6 ft-lb.
Common questions
Is a Sig MCX air rifle legal in the UK?
Yes. UK versions shoot under 12 ft-lb and are legal to own in England and Wales if you are 18 or over. In Scotland you need an air weapon certificate. Read our guide to air rifle law in the UK.
Is the MCX accurate?
It is fine for plinking and short-range targets. For hunting or precision shooting, a PCP is a better choice.
Buying or selling Sig Sauer
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