Top Value Guns
Tim Finley enjoys putting the Sig Sauer MPX through its paces
The month’s top value gun already has a mountain of fans and probably does not need the extra publicity of my humble review, but I’d still like to share my thoughts on the redoubtable Sig Sauer MPX. It caused a massive stir when it was launched, as did its bigger brother, the MCX.
The MPX is a heavy gun, and it feels hefty in the hands at 3kg, making it only 0.3kg heavier than the real 9mm MPX, which weighs in at 2.7kg, and the overall length is exactly the same at 654mm.
It is CO2-powered, and uses the biggest CO2 power-plant that you can get into a gun – the massive 88-gram screw-in bulb. Although the instruction book states that it uses a 90-gram bulb. On the MPX the big bulb fits nicely in the butt stock, just as if it was designed for a 88/90 gram bulb, even as a firearm. The synthetic butt is held on the action by a push-in, spring-loaded button on the right-hand side of the butt tube, and at the end of the removable butt is a rubber butt pad with the Sig Sauer logo SIG.
The biggest issue with a multi-shot CO2 gun that wants to shoot lead pellets and have a removable magazine, is how you feed the pellets into the barrel, so Sig Sauer cleverly came up with a belt-fed system within the removable magazine. Both the MCX and MPX use the RPM system – RPM stands of course for ‘Rapid Pellet Magazine’ – and I’ve always been sceptical when it comes to pellet magazines like these. In the past, such things have been great ideas, but not so much in practice – not so the RPM, which uses a 30-section chain of alloy and synthetic links that travel around in the magazine. The chain has to be taken out in order to load it up, but in the owner’s manual there is a page of clear instructions on how to do this, starting with how to remove it without damaging the internals.
The trap door on the right-hand side of the
magazine opens so that the bottom part of the chain can be taken out, and it has to be taken out clockwise as shown in the illustrations. The pellets can then be loaded into the chain, and of course, there is a right way and a wrong way. The main thing is to ensure that they are pressed quite firmly into the synthetic tubes so that they don’t fall out. Running around the chain is a raised block, and this runs in a key way inside the magazine, which inserts just like the real one, and the magazine release catch is on the right-hand side, above the trigger guard.
To cock the rifle, you pull back on the cocking slide. Again, just like the real thing, the slide is pulled back by hooking two fingers, simple. The safety catch is right above the trigger – ambidextrous, of course, as is the grip. Chronograph testing was a long job, especially with one magazine, but in the end it gave me five 30-shot magazines’ worth of useable shots – that’s 150 pellets downrange.
The power output ranged from1.5 to 3.9 ft. lbs. and as this is a short-range plinking gun, this is perfectly acceptable. Also, with the length of 200mm rifled steel barrel, it has to be set to sub 6ft.lbs. to stay within the UK gun laws, and the MCX has the longer barrel so you can possibly convert into a pre-charged power-plant. You can get an adaptor to use 12 gram CO2 bulbs if you just want a quick plinking session, and don’t want to leave the expensive 88 gram bulb in the gun, or waste money by removing it for storage.
The handling of the MPX is superb, either left- or right-handed, and the build quality is very good – they are made in Japan. It comes fitted with an open-sight system, which folds down to enable a red-dot sight to be fitted if required. In fact, they sell the MPX with a Sig Sauer 20R red-dot sight as a package. I fitted the red-dot sight and found it to be top quality. The height of the mount is such that the flip-up sights index to the red dot, and this makes them back-up sights; should the red dot fail, the open sights can be flipped up and away you go. The front is a simple post, but this can be adjusted up and down by a clever spring-loaded plunger locking system, another nod to the real MPX. The rear sight has two flip-up dioptre elements, a small and large aperture, and is adjustable for windage. It proved very accurate at 6 yards with all shots falling within 20mm. Yes, it’s expensive for a low-powered plinker, but it truly is worth the money – and then some. I
The Sig MPX is an all-action plinker with all sorts of appealing features.
It’s a Sig, Tim, but not as we know it.
The chain pellet holding system.
The safety catch fire to safe on the left-hand side; note the red dot.
The 88 gram, CO2 bulb is housed in the removable butt stock.
Closing up the magazine.
The cocking handle.
The pellets in the chain system.