FX Impact M4, Image 1
FX Impact M4, Image 1

FX Impact M4 .35 Caliber PCP Air Rifle

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5.012 reviews
17 answered questions

$2,249.99

Color:Copper

Copper

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Description

Setting out to develop a true hunting powerhouse, FX Airguns delivers the Impact M3 .35 Caliber. Retaining all of the adjustability and desirable features of the existing platform and some big new improvements, the Impact M3 .35 Caliber brings power and precision together in a marriage made in airgun heaven! Thanks to the upgraded Power Plenum 720, the Impact now ventures into large game hunting territory with authority.

The Impact M4 .35 Caliber features an 800mm Smooth Twist X Superior barrel liner, set up to deliver stunning performance with larger pellets. Sending pellets downrange at high speeds and generating over 156 FPE (with the FX Slug Power Kit) at the muzzle, the Impact M4 is firmly a part of the medium and large game hunting conversation. Coming standard with a removable 580cc carbon fiber air cylinder capable of a stunning 45 shots per 250 BAR fill, shoot with confidence whether you're in the field or in a benchrest competition. The premium side shot magazine holds 18 rounds in .35, so you always have lead on tap. 

Of course, the beauty of the Impact platform is the ability to change calibers and settings at will. The highly touted AMP MkII (Adjustable Match Precision) regulator, micro and macro external hammer spring adjustment, and external valve control adjustment are all at your fingertips on the Impact M4. And because the rifle utilizes the Smooth Twist X liner system, swapping calibers or liners is a breeze. The ergonomics are perfect for shooters of all shapes and sizes, and make the operation of the rifle seamless. And the quick set trigger ensures you have full control over each and every shot, to place them exactly where you desire.

The rear Power Block sets the Impact M4 apart in terms of power adjustability. 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 has completely redesigned the rear block and the valve house which allows for better air flow, efficiency, and power potential.
The Power Block will be especially useful for those who desire to shoot heavy slugs. The pressure in the plenum can better translate to the pressure behind the slug upon firing, allowing higher speeds and power. Those shooting heavy slugs are encouraged to add the FX Impact Tungsten Hammer weight to also allow for higher working pressures.

If you've been itching for a big bore that offers true precision without skimping on power, the FX Impact M4 .35 Caliber is the rifle you've been waiting for! 

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FX Impact M4 .35 Caliber, PCP Air Rifle

  • FX Smooth Twist X Superior (STX) Barrel System
  • Fully shrouded 800mm barrel 
  • 250 BAR (3,625 PSI) Max Fill Pressure
  • Quick Tune System for virtually tool-free adjustments
  • Equipped with improved 75cc Power Plenum 750 - allowing for an even wider range of power adjustment
  • Power Block, redesigned rear block
  • Male Quick Disconnect Fitting
  • Reversible Forward Mounted Sidelever Cocking
  • Removable 580cc Carbon Fiber Air Cylinder (Additional Cylinders Sold Separately)
  • Picatinny/Weaver optics mounting rail with 30 MOA compensation
  • Rigid top plate for enhanced shooting experience with new dovetail allowing the picatinny scope rail to be adjusted to accomodate various optics
  • Picatinny accessory rails below cylinder and on each side of the forearm
  • Quick Set Trigger System
  • Wika dual pressure gauges: one for air cylinder pressure, one for regulator pressure. 
  • Height Adjustable Rubber buttpad
  • UG1 AR style pistol grip
  • AR15 style manual safety
  • Interchangeable Calibers and Barrel Liners (Sold Separately)
  • Externally Adjustable AMP MkII (Adjustable Match Precision) Regulator
  • Externally adjustable hammer spring tension with new macro and micro adjustments
  • Externally Adjustable Valve Control
  • Side Shot Magazine with 18 round capacity
  • Maximum Muzzle Energy: 155 FPE (w/800mm barrel, 81gr pellet, at 930fps)
  • Maximum Velocity: 930 FPS with 81 Grain pellets*
  • Up to 45 shots per fill
  • Includes one side shot magazine and 3 year transferable warranty

 

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Specifications

Max Velocity
930 fps
Grip
Ambi
Color
Copper
Scopeable
Weaver/Picatinny
Overall Length
44.0"
Buttplate
Adjustable
Function
Repeater
Weight
7.35 lbs
Safety
Manual
Suggested for
Hunting
Caliber
.357 (9mm)
Muzzle Energy
155 ft/lbs
Loudness
3-Medium
Barrel Length
31.5"
Shot Capacity
18
Barrel
Rifled
Trigger
Two-stage adjustable
Action
Sidelever
Powerplant
Pre-charged pneumatic
Max Shots per Fill
45
Body Type
Rifle
Fixed/adj. power
Multiple settings
Cylinder Size
580 cc
Shrouded
Yes

PCP Fill Options

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Overall Rating

rating
5.012

Ratings

5 star
9
4 star
3
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Tell us what you think

10 of 12 FX Airguns Impact M4 .35 Reviews

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Most Recent
Overall rating
rating
5
Value for money
rating
3
Accuracy
rating
5

Mod ability

Free scope with the rifle. Would love to see a 40cal one for deer hunting with 400ft lbs of muzzle energy

Great gun and easy to change caliber

pelletman May 10, 2023

You don't need a 40 cal to shoot/hunt deer. I have dropped deer with my 25 cal at 45-55 yrds. I own a Impact and Crown and they wll drop deer at 50-75 yrds buy You need to have your gun tuned to shoot at least 1000 fps. To each their own but 25 and 30 cal will get the job done

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Helpfull Review?
Overall rating
rating
5
Value for money
rating
4
Accuracy
rating
5

Shoots well out of the box. I have the pre Power block which I purchased in early 2022. The bronze, IMO. is the better looking of the two choices. My came shooting at 865 FPS with 81 grain pellets. I can punch a hole through a 1" pine board at 100 yards. Its powerful, accurate and is very adjustable for power. I have upgraded to the power slug kit from Huma Air and tuned the regulators (155/135 bar f/r). I am shooting at 905-915 fps now w/ 81 grain pellets. This is one of my favorite PCP's to shoot now. I am happy with the gun and would recommend it to others.

I think the AMP regulators are build too cheap, plastic piston. The second regulator is difficult to adjust (in trigger guard). Both my regulators have shown creep over the past year. FX parts are pretty well made BUT the metal is way too soft. Thus can be damaged very easily.

Parts are easy to get @ FX USA. They ship quickly and the staff is helpful. I upgraded to the Huma Air -regulators, and power slug kit. I did install the new power block but I did not see any improvement in fps. Maybe I am using the wrong transfer port? FX tells they are different but didn't explain how.
Mine shoots FX pellets and JSB equally well but not Grizzles to well. One hole groups at 35-40 yards.

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Helpfull Review?
Overall rating
rating
4
Value for money
rating
4
Accuracy
rating
5

The ability to adjust a lot of parameters to optimize your results with different projectiles. The relatively light weight. The side lever loading/cocking.

Not much comes to mind.

My rifle seems to have a leak that is slow enough to not immediately be obvious and that has been with the gun from before I got it. I have never filled the gun beyond 232 bar. While I am not sure how many rounds I should have before it comes off the regulator at full power, I get more than a mag for sure. But I have seen the pressure drop over a two week period after a fill from the Nomad II from 232 bar to about 130 bar as measured by the reservoir gauge. During that time, the gun was not fired or cocked and was always in a relatively constant temperature environment. My calculations say that the reservoir air temperature would have to have been over 252 degrees Celsius immediately after the fill for the drop to room temperature to solely explain the pressure difference. Unlikely, but I am not sure that it is a serious problem at the moment. Only know of the 81.02 gr. pellets (FX and JSB) as recommended ammo. Ordered April 12th and still unavailable.

Thomas Aug 09, 2021

Tighten the two gauges just a hair if not them have them fix it.

Add a Comment
Helpfull Review?
Overall rating
rating
5
Value for money
rating
4
Accuracy
rating
5

Powerful and accurate. The accuracy is incredible.

I would make it a flat top with an option to remove the scope mount that looks kinda like a carry handle. Then Id have an option for open sights. Yup. Open sights.

Mine showed up and it appeared to have been handled somewhat and the moderator was missing. Contacted Pyramyd and they said it was probably messed with during shipping. They gave me FX contact info. I am surprised that the company I paid over two thousand dollars to for this rifle is not equipped to handle the issue. I know the FX moderator is a cheap POS but I shoulda got one with my purchase and IMHO Pyramyd should have handled it for me.

ZACHARY Oct 12, 2022

I've seen these comments, and no suppression of any of your dislikes were moderated.. If I may add, If Pyramyd Air were to pay for all manufacturer errors it would become very expensive in no time at all, so to be a responsible dealer they would have no alternative but to pass these expenses on to the customer. I don't know about you but I think the prices are high enough already that John Q Public would no longer be able to shop Pyramyd Air if they were to do so.. Also, possibly the need to let some staff go as well.. Just my humble opinion that's all...!

Matt May 12, 2022

Shoulda bought from Airguns of arizona or Utah Airguns. I used to order from pyramyd all the time but I feel They have gotten to big and as a result they aint what they used to be at all! Furthermore, they now moderate and deny or approve reviews, comments etc so I doubt this will even be seen

Richard Oct 20, 2021

i fully agree with you on that, this shows a lack of customer support.

Add a Comment
Helpfull Review?(-1)
Overall rating
rating
5
Value for money
rating
4
Accuracy
rating
5

Powerful and accurate. The accuracy is incredible.

I would make it a flat top with an option to remove the scope mount that looks kinda like a carry handle. Then Id have an option for open sights. Yup. Open sights.

Mine showed up and it appeared to have been handled somewhat and the moderator was missing. Contacted Pyramyd and they said it was probably messed with during shipping. They gave me FX contact info. I am surprised that the company I paid over two thousand dollars to for this rifle is not equipped to handle the issue. I know the FX moderator is a cheap POS but I shoulda got one with my purchase and IMHO Pyramyd should have handled it for me.

Add a Comment
Helpfull Review?
Overall rating
rating
4
Value for money
rating
4
Accuracy
rating
5

the gun is now set up the way i like and very straight shooting , it is used for hunting here in florida and has done its job very well because of the pellet goes exactly where i want them , i have a 22 cal slug liner also and it has taken more pests ,nutria , rats ,racoons possums , crows , otters, copperheads ,moccasins, and iguanas ,does so pretty quiet . i am a landlord of multiple properties ,also own a small marina , i have multiple pest complaints and the 22 with slugs on the 35 platform is the real deal ,dont know why more people talk about it . you can send any weight or style slug you like at almost any speed you want for safety or power . really. i have hunted and fished for a living for over 40 years, son of a man that ran several gun ranges in the navy grew up in the woods on powder guns . no neighbors for 3/4 mile one way and 10 another in florida , most fun gun i ever had , out of hundreds . i am 60 kids have all firearms , i have 16 air and hooked .

manometer leaked out of the box, i had one that fit so of course shot first day. need to fix them now the plenum meter started 2 days ago reason for this post . but i have shot over 3000 rounds , i know addicted i am told , makes me happy. next have had a 30 cal barrel on order for 4 months now ,no barrel in sight? i have high hopes for the 30 on this platform . it comes from using 30 cal in many diff guns ,if you hunt you know seems very stable at all ranges and grains. so 35 owners should try new cals ,fx please get them to us! favorite gun and ear holes at 5 to 150 make it that.

if you can do it( pull the trigger) its a working gun and i use it at work , makes that part of my job something i look forward to because it does exactly what i ask it to .

Add a Comment
Helpfull Review?(1)
Overall rating
rating
5
Value for money
rating
4
Accuracy
rating
5

Very well made, beautiful fit & finish, great trigger. If you're in the market for a .35 this is the one! Mine factory stock, averages 850 fps, & gets 42 honest shots before it starts to fall off the regulator. It hits hard & has a phenomenal shot count. Gonna be a little pricey to shoot, but totally worth it!

Needs a fitted gun case & a more ambidextrous design. Lefty shooter will have a problem due to the magazine location.

My FX impact was missing the factory moderator. With just one phone call, Pyramid air got in touch with FX and another moderator was hipped to me directly from FX. I can't say enough good things about both companies, buy with confidence.

Add a Comment
Helpfull Review?(1)
Overall rating
rating
4
Value for money
rating
4
Accuracy
rating
5

The power is there and a bit of an over kill for a squirrel. Don't ask me how I know. Accuracy at 50 yards and beyond is great. Lighter than my Sumatra and the trigger feels like a pound or less. Moderator ready and slug loving.

Nothing!!!

Right now as I type this there is not a slug liner on the market for it nor are there any FX slugs for it on the market. This is a mistake on FX part because it is what we have been waiting on. Some of us have had this gun for over 6 months. Thank god for NSA because if not for them we would not have slugs to sling out of this thing

Ryan Mar 20, 2023

Hello Paris, I use the 93 grain that is recommended by NSA. I am getting 162 FPE at the muzzle. At 50 yards I am putting a 12 shot group in less than a 1/2" CTC. They fit in the FX magazine. They load just fine.

Ryan Nov 01, 2022

The NSA Slug that is recommended is the .357 93 grains. They shot well out of my standard Superior Liner. I ordered the FX 800mm Barrel tensioning kit with the heavy superior liner, and it comes with the carbon fiber sleeve. I also ordered the tungsten hammer. This should get me up to 180 to 190 FPE. I am already slinging the 81.02 grain diabolo pellet at 877 FPS on Power Wheel # 10. Have 6 more clicks to go. I will be tuning this Saturday and Sunday at the gun range. The rifle is awesome. This is my third Impact. I have the .30 caliber MK II 700mm and the .22 caliber M3 700mm. All are very accurate. I bought my .35 caliber about two or three weeks ago from Pyramyd Air.

Paris Mar 19, 2021

Which slugs do you use from nsa? Di you have to load them individually? And how are they shooting?

Add a Comment
Helpfull Review?(1)
Overall rating
rating
5
Value for money
rating
5
Accuracy
rating
5

FX is the highest quality Airgun I have eve shit. I have many guns nothing compares It is lightweight extremely accurate and built to perfection If you can get one by all means do

Nothing

Add a Comment
Helpfull Review?(2)
Overall rating
rating
5
Value for money
rating
5
Accuracy
rating
5

Every thing. I gut Ronin modurator and extention. I can use it inside the hoise even if people sre sleeping. I is a quiet level one quieter than my 0.22 airguns.

Nothing.

Buy the moderator Ronin and extention from Donny and you can use it in your backyard. I had 2 prior airguns .357 with moderators and I sold both for less than40% of the prices because they were too loud and my neighbors were not comfortable. But now I can use it at night and and nobody will get bothered.

Add a Comment
Helpfull Review?(2)
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