Umarex Fusion 2 Air Rifle Test Review


Testers: Doug Wall, Stephen Archer

Caliber: .177

Model Number: 2251365

Test Date: 20 March 2020

Serial Numbers: AD173448

Source of Supply: Supplied by Umarex USA

Condition: New

We Like

A great, family-friendly plinker
Accurate with the right pellets

We Don't Like

Too low-powered for hunting
Like all CO2 guns, it’s not for use in cold weather
Shot count lower than claims


  • Value for Money
  • Speed and Accuracy
  • Trigger and Cocking Effort
  • Comparison to Makers Claims:
  • Consistency
  • Noise Level
  • Sights
  • Shootability
  • Appearance and Finish
  • Buying and Owning



The Umarex Fusion 2 is probably the most family-friendly, home range friendly air rifle that the HAM Team has ever seen. With the current prevalence of travel restrictions, this is a great benefit for those who want to shoot together in the backyard or basement.

This is an easy HAM Gold Award winner. If you’re looking for a low-cost plinker or informal target shooter. You can’t go wrong with the Fusion 2 at this price!

Just buy some RWS Meisterkugeln PISTOL pellets to go with it…


At the time of writing, The Umarex Fusion 2 air rifle is being sold at $129.99 by Pyramyd Air. This is a great price for a magazine-fed, silenced air rifle and only $10.00 more than for the previous model Fusion “1”.

Furthermore the Fusion 2 includes a bundled 4 x 32 scope and rings. It also has the capability of using both 88/90 Gram CO2 cartridges, as well as the regular 12 Gram size. Then add the Picatinny scope rail – unnecessary on a CO2-powered air rifle, of course – but still useful and the M-Lok slots in the underside of the stock and you have a remarkably versatile little air rifle that’s indisputably great value!

Umarex Fusion 2 Air Rifle Test Review

Of course, the Fusion 2 is not a hunting powerhouse. It’s not intended to be. For long-range shooting and hunting, you’ll need a completely different air rifle. And – as with most “free” bundled scopes – you’ll really need to buy something better.

But the Fusion 2 is intended to be a close-range, even indoor, plinker and target shooter. If that’s what you want, this is a great little air rifle!

Umarex Fusion 2 CO2 Rifle 0.177
Umarex Fusion 2 CO2 Air Rifle



The Fusion 2 tested by HAM was actually a late pre-production model. In other words, it was part of a small run of production-specification guns that was built as a final confirmation before volume manufacturing commenced.

Probably for this reason, there was a factory test target included in the box. This is it below…

As we can see, it shows a 5-shot group made with RWS Hobby pellets. The group size is 16.5 mm (0.65 Inch) at 10 Meters (33 Feet). The accuracy produced by HAM Tester Doug Wall with a 10-shot string of the same pellets at 10 Yards is thus very comparable with the factory results.

PelletAverage Muzzle VelocityAverage Muzzle EnergyAccuracy
Gamo Raptor Platinum 4.7 Grain634 FPS4.19 Ft/LbsPoor.
H&N Field Target Trophy Green 5.56 Grain612 FPS4.62 Ft/LbsGood.
RWS Hobby 7.0 Grain572 FPS5.09 Ft/LbsGood.
Crosman Premier HP 7.9 Grain570 FPS5.7 Ft/LbsPoor.
JSB Exact Diabolo 8.44 Grain584 FPS6.55 Ft/LbsVery Good.
H&N Field Target Trophy 8.64 Grain600 FPS6.92 Ft/LbsVery Good.
H&N Baracuda Match 10.65 Grain561 FPS7.44 Ft/LbsVery Good.

It has to be said that the HAM Team were a little disappointed with this level of accuracy. Typically we take the gun and the best-shooting pellets and shoot outdoors on our 25-Yard range for this section of the review. However, the weather remains obstinately cold – there’s snow in the air every night and sometimes enough to cover the ground, too. That’s really too cold for a CO2 gun.

So we made another indoor test at 10 Yards with a variety of alternative pellets. Here we see the best. It’s actually excellent performance! HAM Gold Award-winning RWS Meisterkugeln PISTOL pellets gave this close to “one hole” 10-shot group with the UTG Bugbuster scope.

Umarex Fusion 2 Air Rifle Test Review

So for this gun “Meister Pistols” are the best – they not only shot better than the RWS Hobbys but also the top quality RWS R10 Match pellets we also tried!

We’ve left speed to last here. No-one will be buying the Fusion 2 expecting “Zillion FPS” Muzzle Velocity – or at least they shouldn’t be! HAM test results showed pellet-dependent Muzzle Velocities between 561 and 634 FPS in our cool – 60 degree F – basement. That’s plenty for target shooting or plinking out to 20 Yards or do.

These FPS numbers will also be much higher in warmer temperatures, as we’ll cover below…



The trigger pull weight of the Umarex Fusion 2 tested by HAM averaged 3 Lb 10 Oz. This is somewhat higher than the HAM Team would prefer, however it doesn’t feel that heavy in use.

The trigger is officially-described as a single-stage unit. However the gun tested by HAM had a long “zero weight” pull of slack that needed to be taken-up. This made it feel somewhat like a 2-stage trigger.

Having taken-up the slack, there’s a long, spongy pull until the sear releases. It’s not an unpleasant pull and it’s not rough or catchy. However it is not easy to predict when the sear is about to release, which is – of course – not ideal for peak accuracy.

Umarex Fusion 2 Air Rifle Test Review

On the positive side, there’s a simple, easy-to-operate manual safety and a surprisingly-light bolt that cocks on opening.



The manufacturer claims a maximum Muzzle Velocity of 700 FPS with alloy pellets and 650 FPS with lead. Based on these test results – and knowing that CO2-powered airguns shoot about 2 FPS faster for every degree Farenheit increase in temperature – the Fusion 2 tested by HAM comes close to the manufacturer’s claims.

The maximum Muzzle Velocity of 634 FPS with alloy pellets at 60 degrees translates into an estimated maximum of 694 FPS at 90 degrees F.

The 572 FPS developed with the light RWS Hobby lead pellets in accuracy testing equates to around 602 FPS at 90 degrees. However, we did better in the shootdown test – as you’ll see below. In this case, the first half dozen shots actually met the 650 FPS claim for lead pellets, even at just 70 degrees.

So the Fusion 2 air rifle tested by HAM is clearly able to attain the manufacturer’s FPS claims under the appropriate temperature conditions.

The FPS is sufficient for the task of plinking and target shooting. Note that this is NOT a hunting gun. Anyone wanting a powerhouse hunter will make a different choice of air rifle.

As for shot count per fill, Umarex claims over 70 shots from 2 x 12 Gram cartridges. Or 250 shots or more, from one 88/90 Gram cartridge.

In HAM testing, we found achieved around 45 “good” shots from one pair of 12 Gram CO2 cartridges. For this test, we shot once every 5 seconds, plus breaks for loading as fast as possible, to represent average use. The test gun stopped firing at shot 51.

As you can see from the graph below, we started at a slightly higher FPS than the accuracy testing. However the temperature was higher, which largely accounts for this. Also the CO2 cartridges were undoubtedly a little warm from hand heat when loading into the gun.

As with all CO2-powered airguns, temperature and rate of fire will make a big impact on the Muzzle Velocity. It’s just one of those facts of life!

Many people complain about such inconsistency in FPS with CO2-powered airguns. But we need to remember that the shot curve we see below is NOT worse than that of many value-priced unregulated PCP air rifles…

Umarex Fusion 2 Air Rifle Test Review

So, the Fusion 2 tested by HAM came-up somewhat short against the manufacturer’s shot count claims. But that still extrapolates to around a total of 165 shots for a 88/90 Gram cartridge, which is a very significant number for one fill for any air rifle.

Overall, the company claims that the Umarex Fusion 2 “fuses superior airgun ergonomics with superior accuracy, light weight, and easy operation”. When shooting the right pellets, that a reasonable summary of the gun’s benefits.



The Fusion 2 tested by HAM delivered pretty good consistency. The Standard Deviation (measure of shot-to-shot consistency in a string) was well controlled at an average of just 5.5 FPS across the range of HAM test pellets. This is PCP-level consistency, although HAM Tester Doug Wall was firing fairly slowly, knowing the tendency of any CO2-powered airguns to loose FPS if fired rapidly.

The larger 88/90 Gram CO2 cartridge gives greater shooting consistency than the 2 x 12 Gram setup due to the larger mass of CO2 and steel inherent in the large, heavy cartridge.

Trigger pull weight varied by about plus or minus 5 Ounces around the average. This, again, is satisfactory consistency for an air rifle of this type.

The magazines loaded and fired with consistent ease, too. This shows that a low-priced, magazine-fed air rifle can function reliably and well.

The only magazine issue is that there’s no block to prevent firing on an empty chamber. So you either have to keep count of the shots taken, or accept an occasional blank discharge. The Fusion 2 is far from the only magazine-fed air rifle to have this issue however, so it’s definitely excusable at the price.



There’s no doubt about it. The Fusion 2 is one of the quietest air rifles ever tested by HAM. Partly this is due to the low power of the gun, however the triangular “Silenc-Air” moderator also obviously does its’ job well.

If you’re looking the the ultimate backyard- or basement-friendly air rifle, this has to be it!



The Fusion 2 is bundled with a 4×32 scope with simple, duplex reticle and rings. This scope is, admittedly, better than nothing. But not by much, as you can see in the HAM review of a typical scope of this type.

But let’s be realistic. What else is it realistic to expect to be bundled with an air rifle at this price?

Yes, it will do the job. But you’ll be so much happier if you invest in a scope upgrade. We mounted a Leapers UTG Bugbuster as part of this review. It doubled our pleasure in using the Fusion 2 and – I’m sure – improved accuracy too!

Umarex Fusion 2 Air Rifle Test Review

The lack of iron sights will be a negative for some – and there’s no easy way to fit any that we can see. However, the overwhelming majority of air rifle shooters use a scope. HAM considers that Umarex made the right call on this one.



HAM Tester Doug Wall commented that “The gun shot comfortably for me. It’s light, but not ‘plasticky’ feeling. The multi-shot capability is very handy.”

All-up shooting weight, including scope, is just around 7 Lbs 0 Oz. Surprisingly, perhaps, the weight is the about same whether using one 88/90 Gram CO2 cartridge or the 2 x 12 grams in the adapter.

This light weight, combined with the easy-operating bolt, reasonably-light trigger and 14.25-Inch length of pull, means that the Fusion 2 is an airgun that would suit almost any member of the family.


Umarex Fusion 2 Air Rifle Test Review



The Fusion 2 has an unashamed “black gun” appearance, in tune with current market demand. The aggressive, thumbhole stock is well designed, in the HAM Team’s opinion.

Overall the Fusion 2 has an unique, distinctive appearance, moreover one that handles and balances well for the shooter.

Finish is generally very good. The synthetic stock is well-molded, with very little flash at the mold seams. The black rubber buttpad looks good and works well.

About the only metal parts visible are the barrel shroud, CO2 adapter and – thankfully – trigger blade. These also are well machined and finished.

Overall, finish is better than it’s reasonable to expect for an air rifle of this price – in the HAM Team’s opinion.



HAM test reviews do not usually include “Versatility” as a category. But the Umarex Fusion 2 deserves some mention of this as it’s one of the most versatile air rifles around at this price!

First, there’s the choice of power supply. This can be either one 88/90 Gram CO2 cartridge or 2 x 12 Gram cartridges using the included adapter. The 12 Gram adapter includes a de-gassing tube cap that actually works – unlike the one fitted to the original Fusion!

This is the only air rifle we can recall that includes such a choice of CO2 power supply without the need for an (extra cost) accessory purchase. It means that an 88/90 Gram cartridge can be loaded for an extended shooting session.

If only a few shots are to be taken, then the 2 x 12 Gram option becomes attractive. The Fusion 2 can even be powered by one full and one empty 12 Gram cartridge if very few shots are required to be taken at one time.

The degassing functionality for the 12 Gram CO2 cartridges also works well. So, if you’re using the 12 Gram cartridges and don’t want to “shoot the pressure down” using the bolt handle, degassing is definitely a viable alternative with the Fusion 2.

Umarex Fusion 2 Air Rifle Test Review

Then there’s the M-Lok slots under the stock’s forend. And we almost missed an additional M-Lok slot under the buttstock right at the rear! This would enable a sling to be fitted to the Fusion 2 – if required – using the front and rear M-Lok slots.

The Fusion 2 also scores by being supplied with two 9-shot magazines. These may not be the highest-capacity pellet magazines available, but they score by being about the smallest and easiest-to-load that there is!

The user guide is clear, well-written and illustrated – as we have come to expect from Umarex. It’s in English, French and Spanish.

There’s also a satisfactory 12-month warranty, too, that’s fulfilled by Umarex USA in Fort Smith AR for US customers.



Umarex Fusion 2 Air Rifle Test Review

Umarex Fusion 2 Air Rifle Test Review

Umarex Fusion 2 Air Rifle Test Review

Umarex Fusion 2 Air Rifle Test Review

Umarex Fusion 2 Air Rifle Test Review

Umarex Fusion 2 Air Rifle Test Review

Umarex Fusion 2 Air Rifle Test Review

Umarex Fusion 2 CO2 Rifle 0.177
Umarex Fusion 2 CO2 Air Rifle

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