FX Impact M4 Compact PCP Air Rifle
$1,999.99
Caliber:.177 (4.5mm)
Color:Black
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Questions?Description
Swedish manufacturer FX Airguns continues to turn out new models, blending power and accuracy into a very small package with the new Impact M4 Compact! Featuring a 500mm barrel and an overall length of just 25", the Compact only comes up short in one area, and that's the length! A stubby 300cc removable carbon fiber bottle is the only other departure from the standard Impact, and still provides a solid shot count despite the small size.
From a 250 BAR fill, you can expect up to 150 shots in .177, 110 shots in .22, 70 shots in .25 and 30 shots in .30 caliber. With plenty of energy to accompany those shot counts, you can expect up to 25 FPE in .177, 45 FPE in .22, 60 FPE in .25 and a whopping 80 FPE in .30! Long time fans and followers of the Impact platform may recall that early versions of the standard size rifle produced about those same specs, with a longer barrel and larger air cylinder. FX is able to achieve this impressive stat line thanks to the power plenum 750! Adding 75cc of firing chamber volume and new valving allows for these impressive numbers that simply couldn't be achieved before this innovation.
This is also due, in part, to the rear Power Block. While the power plenum stages the power capabilities of the FX Impact, the rear block handles that transfer of power much like a car’s carburetor. FX redesigned the rear block and the valve housing which allows for better airflow, efficiency, and power potential. The Power Block will be especially useful for those who desire to shoot heavy slugs. Those shooting heavy slugs are encouraged to add the FX Impact Tungsten Hammer weight to also allow for higher working pressures.
Of course, the rest of the rifle packs all the innovation the Impact is known for. This includes the AMP MKII regulator, external hammer spring adjustment and valve control. Otherwise known as the new Quick Tune System, this easy-to-adjust system is unlike any other on the market! The Compact still utilizes the Smooth Twist X Superior barrel liner system, which has proven to be astonishingly accurate. This means you can easily change out calibers and liners. You can even turn your Impact Compact into a standard size Impact if you so desire. The possibilities are truly endless with this platform!
Helpful resources:
- Learn about hunting with air rifles
- Tips for picking the right airgun for hunting game & pests
- Learn about airgun hunting laws in your state
- Shop related categories: pellet guns, pellet rifles
FX Impact M4 Compact PCP Air Rifle
- 500mm FX Smooth Twist X Superior (STX) Barrel System
- End of shroud is threaded 1/2" x 20 to accept a moderator (not included)
- Interchangeable Calibers and Barrel Liners (Sold Separately)
- Power Block
- 25” Overall Length
- Featuring the new FX Quick Tune System for nearly tool-free tuning
- Externally Adjustable AMP MKII (Adjustable Match Precision) Regulator
- Externally Adjustable Hammer Spring Tension with Macro and Micro adjustments
- Externally Adjustable Valve Control
- 250 BAR (3,625 PSI) Max Fill Pressure
- 170 BAR max regulator working pressure
- Equipped with the 75cc Power Plenum 750 - allowing for an even wider range of power adjustment
- .22 and .25 cal M4's feature Dual transfer ports - one optimized for pellets, one for slugs
- Male Quick Disconnect Fitting
- Reversible Forward Mounted Sidelever Cocking
- Removable 300cc Carbon Fiber Air Cylinder (Additional Cylinders Sold Separately)
- Picatinny/Weaver optics mounting rail with 30 MOA compensation rides on 11mm dovetail allowing further customization to meet every shooters need
- Picatinny accessory rails below cylinder and on each side of the forearm
- New Quick Set Trigger - Adjustable match trigger
- Wika dual pressure gauges: one for air cylinder pressure, one for regulator pressure.
- 6.1 Lbs overall weight
- Height Adjustable Rubber buttpad
- FX UG1 AR15 style grip
- AR15 style manual safety
- Redesigned Side Shot magazine capacity*: 34 rds. in .177, 28 rds. in .22, 25 rds. in .25, 23 rds. in .30
- Maximum Muzzle Energy: 25 FPE in .177, 45 FPE in .22, 60 FPE in .25, 80 FPE in .30
- Includes one side shot magazine and 3 year transferable warranty
* - Older Side Shot magazines are compatible with the M4.
Tech Note: While the manual states the M4 models are capable of 300 BAR fill pressures, this is only achievable with aftermarket carbon fiber bottles. The current factory bottles from FX that are included on the rifles are rated for 250 BAR fill pressures and should not be filled over this pressure.
Specifications
Ballistic & Conversion Calcs
Introducing the FX Impact M4 Compact! This powerhouse packs unmatched accuracy into a 25" frame with a 500mm barrel. Despite its compact size, the 300cc carbon fiber bottle ensures a solid shot count: 150 shots in .177, 110 in .22, 70 in .25, and 30 in .30 caliber. Featuring the Power Plenum 750 and Power Block, it delivers impressive energy up to 80 FPE. Experience unparalleled precision with the AMP MKII regulator and Quick Tune System. Unleash your potential with FX Impact M4.
Introducing the FX quick set trigger. Switch from hunting to match grade with one screw. Plus, a stronger magazine and the new brass piston AMP MKII regulator for higher pressures and faster refresh rates.
The M4 Compact's rear Power Block boosts power transfer, ideal for heavy slugs. Pair with the Tungsten Hammer weight for higher speeds and power, delivering unmatched performance for serious shooters.
The M4 Compact's new rigid top plate and customizable scope rail system enhance performance and shooting experience. Adjust the rail for perfect eye relief or mount directly on the 11mm dovetail for versatility.
Discover the FX Impact M4 Compact! This powerhouse delivers unmatched accuracy in a 25" frame with a 500mm barrel. Enjoy a solid shot count, impressive energy up to 80 FPE, and unparalleled precision with the AMP MKII regulator. Unleash your potential today!
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Overall Rating
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Tell us what you think
8 of 8 FX Airguns Impact M4 Compact Reviews
The impact has been a great gun. Amazingly accurate, and easy to tune.
Things I Would Have ChangedNothing
The build quality is good, like all FX airguns.
Things I Would Have Changed#1 would be accuracy! (18.13gr JSB) This gun falls WAY behind any FX I have owned. The valve adjuster can only max at 4 lines, not 5+ like the longer versions. It should come with a moderator because it is a 5 sound level without one.
What Others Should KnowI am HUGELY DISAPPOINTED with this gun. I own over 30 PCP airguns, and at least a dozen are FX. FX are always my favorites, but this gun is just garbage as far as accuracy. When I received it new from PyramydAir the adjustments were all off the chart. So I contacted FX and they explained that because it is the compact version all normal settings would not apply, except the REG 1 was set at 1700+ which they agreed should have been 1500. They said yes, you can not adjust the valve over 4 lines on that gun, but you don't need to ( I disagree, but that is what they said). All in all, I wish I could get a refund because I don't like this gun at all, it is nowhere as good as my Gen1 Impact .25 which I love very much.
Fairly easy to adjust to the velocity you want. Shoots pellet well stock and with some parts and tuning shoots slugs and pellets very well
Things I Would Have ChangedKind of wish fx would allow new ideas be tested more thoroughly before they would sell a product they dont have in stock yet. But they are cutting edge!
Really like having the compact version, its crazy maneuverable and of course very accurate. Came shooting 830fps but is easily tune able to what ever you need.
Things I Would Have ChangedSo far Im Good, no complaints. And thats After several tins of jsb and Fx pellets.
What Others Should KnowGreat plinking fun, sweet paper punching, makes a great woods walking/ truck gun.
Accuracy; ergonomics, adaptability, quality. My first rifle was a Sheridan Blue Streak with a weaver peep site purchased at age 13 in 1964. Learned how to shoot with it and enjoyed countless hours shooting it. Shifted to powder burners for many years, but my bucket list always included an alum pic grade rifle. This was it. Accurate, compact, quality all the way.
Things I Would Have ChangedVery little. The stock is a bit short, but after market extensions are available. Balance is good. Case is great. An extended quick release for the fill port would be nice.
What Others Should KnowBe careful. With the ability to switch to 700mm slug barrel, change calibers, add larger cylinders, etc. this rifle can become addictive. Check off one bucket list item.
a laser beam, I own 2 impacts that shoot heavy slugs and this compact does not disappoint, I put a slug liner in shooting 18gr jsb's at 940fps, 3/4" groups at 95yds, 100 bar, min hammer, line 3, i get 3 mags per fill, amazing!
Things I Would Have ChangedAbsolutely nothing
What Others Should Knowtuning is key with any impact, takes time and patience, but it's worth it
I think my other air guns are going to collect a lot of dust . I bought the compact 30 cal because it was the only one available. there is not one part of this gun i don't like. i put a donny fx on to make it quieter and i ordered a 600 mm barrel with a moderator. this is a very accurate gun . it is a bit much for squirrels but it stops woodchucks with one shot. I think i will buy a second one in 22 with a 600 mm barrel as soon as they are available.
Things I Would Have Changedi should have bought one sooner
What Others Should Knowtry one you wont regret it
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Jan 24, 2024
By Ryan
I literally pounded a nail with a head barely larger than a .177 pellet in a board at 20 yards with my .177 barrel and jsb pellets. In .30 the power is incredible and just as accurate. Again jsb pellets. I have a sarissa installed on it and it makes basically no noise. Thing is a dream I had pyramyd test it and zero problems after thousands of shots. I am no expert and this thing is very easy to tune with pellets.
Things I Would Have ChangedNothing
What Others Should KnowExpensive but no buyers remorse.