Sig Sauer MPX Gen 2 — .177 CO2 Semi-Auto Air Rifle

Sig Sauer MPX Gen 2 Review — Realistic Tactical Performance

The Sig Sauer MPX Gen 2 is a CO2-powered semi-automatic air rifle. It replicates the legendary MPX pistol-caliber carbine used by military and law enforcement units worldwide . This Gen 2 model features an M-LOK system handguard, a flat blade trigger, a reduced angle grip, a redesigned buttstock, and a low-profile recoil pad . The all-weather synthetic stock houses 88g or 90g CO2 cartridges in the quick-detach buttstock. For UK shooters who want realistic AR-style handling without a firearms certificate, the MPX Gen 2 delivers.

Sig Sauer MPX UK — Key Specifications

The MPX Gen 2 fires .177 calibre pellets from a 30-round rotary magazine . It has a maximum velocity of up to 450 fps, keeping it well within UK legal limits for certificate-free ownership. The total weight is 6.2 lbs (2.8 kg) without a magazine. The overall length is 25.75 inches (654 mm). The flip-up dual aperture peep sights are fully adjustable for windage and elevation. The accessory Picatinny rail accepts optics, lasers, and other tactical accessories.

Sig Sauer MPX Performance — What Owners Say

Owners consistently praise the MPX for its fun factor and realistic feel. A UK buyer uses the MPX for plinking in their garage and at the range. They fitted a Huggett silencer and a red dot sight. They report that it hits targets at 25 metres quite well . Another owner called it fantastic and stated they have never had issues with ammunition feed or the CO2 system . A reviewer who uses the MPX with a UTG red dot shoots dandelion flower heads at 20 feet . Many owners recommend buying extra 30-round magazines. They also note that reloading the magazine belts is a bit fiddly, so having spares makes shooting sessions go more smoothly .

Sig Sauer MPX Problems — Honest Owner Feedback

The MPX has several known issues worth discussing. On a US retailer review site, a 1-star review reported the rifle constantly jams. The reviewer also stated that CO2 gases out on installation or will not install . Another owner reported an internal seal failure after six cylinders of CO2, causing the rifle to lose all gas in seconds . A different user had two MPX rifles replaced, each with persistent reliability issues .

The trigger has a consistent but heavy 7 lb pull weight . A 4-star reviewer noted that the compensators do nothing for performance, only for looks. They also described the gun as relatively loud . The 30-round magazines are made from plastic, which some owners feel spoils the overall quality of an otherwise excellent gun .

The good news is that most owners report a positive experience. Several 5-star reviews state they have never experienced any of these issues and have owned the rifle for years .

Sig Sauer MPX Silencer and Accessories

The MPX works with a dedicated silencer adapter. You can mount a noise moderator with a 1/2×20 UNF or 1/2 UNF thread . Owners report that a Huggett silencer makes a real difference and looks great on the rifle . The M-LOK handguard accepts lights, lasers, and bipods. The Picatinny rail accepts red dot sights or scopes. Owners recommend adding a red dot sight or a holographic sight. This makes target acquisition feel natural and fast .

Sig Sauer MPX For Sale UK — In Stock at Fieldcraft Airguns

Fieldcraft Airguns has the Sig Sauer MPX Gen 2 in stock now. This is the .177 calibre CO2 pellet version. The rifle includes one 30-round magazine, flip-up sights, and an M-LOK handguard. Spare 30-round magazines and magazine loading strips are available separately . The rifle takes 88g or 90g CO2 cartridges. Due to UK law, we cannot ship this rifle directly to your home. You must collect it from a Registered Firearms Dealer. We can deliver to your local RFD for a small handling fee. Every Sig Sauer MPX comes with our exclusive 12 month warranty. We recommend adding a pack of 88g CO2 cartridges to your order. Also add a tin of quality .177 pellets — flat-headed wadcutters or lightweight domed pellets between 5.0gr and 8.5gr work best . We also recommend a red dot sight and a Huggett silencer with the correct adapter. For owners who want to convert the MPX to HPA for more consistent cold-weather performance, the Best Fittings conversion kit is available separately .