FX Fx impact M3 sounding louder?

[Redwolfpaul25]

Hi all.

I own a Fx impact M3 in .25cal, i have it tuned to shoot 39g slugs at 960fps, i have used the same tune since june 2021, everything internally is stock, Airmarksman backbone rail fitted,saber tactical front rail fitted etc. Recently i have noticed it sounds louder at the breech end, i changed the orings on the transfer port and the breech oring, but it still sounds a little louder than it used to, any ideas??.

 

[Vetmx]

I’ve had the same thing happen. I replaced the two orings on the transfer port end of the barrel and it was cured. A piece of toilet paper between the barrel and backbone slid back to the breech confirmed the leak. My gun started making a pop sound instead of only hearing the crisp sound coming from the muzzle.

 

[Redwolfpaul25]

I’ve had the same thing happen. I replaced the two orings on the transfer port end of the barrel and it was cured. A piece of toilet paper between the barrel and backbone slid back to the breech confirmed the leak. My gun started making a pop sound instead of only hearing the crisp sound coming from the muzzle.

After a little more research i think it may well be the small oring on the end of the valve rod, seems to be a common occurrence so i will order a new one in the morning along with a few others.

 

[yenniedn]

After a little more research i think it may well be the small oring on the end of the valve rod, seems to be a common occurrence so i will order a new one in the morning along with a few others.

I would go with what Vetmx said first before you check the oring on the valve rod (which I'm told is a severe PITA to replace). I've had this happen to my Impacts a couple of times in the past and it was typically the orings on the barrel or breech oring that were the cause . . . and they were much easier to replace.

 

[Redwolfpaul25]

I would go with what Vetmx said first before you check the oring on the valve rod (which I'm told is a severe PITA to replace). I've had this happen to my Impacts a couple of times in the past and it was typically the orings on the barrel or breech oring that were the cause . . . and they were much easier to replace.

I replaced the breech oring and the two orings on the barrel already, as far as i can tell from looking on YouTube, the only other places to look at are the valve rod oring, i will replace it and see what happens.

 

[Vetmx]

I replaced the breech oring and the two orings on the barrel already, as far as i can tell from looking on YouTube, the only other places to look at are the valve rod oring, i will replace it and see what happens.

Before you tear your gun down to pieces, diagnose that little oring first. Single load and a piece of tape. Never tear an Impact down that far on a whim. You might aggravate it.

 

[Redwolfpaul25]

So i copied what someone on this forum did and i placed one of those round little pastey stickers that you get with the shoot and see targets, i placed it over the end of the valve in the magazine port on the M3, i fired a shot and off it came, so i will now change this oring.

 

[Bigragu]

Have every tool and consumable (lubes, thresdlocks, etc) at the ready. You don’t want your impact down without air for too long or you’ll sprout up leaks elsewhere. Take lots of notes and measurements

 

[Redwolfpaul25]

Lucky for me me when i replaced the oring and re-pressurised the M3, nothing went wrong, its been several hours now and no loss of pressure so all good.

 

[radjabatak]

Hi i have m3 in 177... The breech oring is 4,3*1,5. I have search the oring size in my country. The only available only 4*1, 5 or 4,5*1, 5.. So, can i use the size? My breech oring is not broke yet but i just want to have spare oring in my stash..

 

[Gr8Recreation]

Hi all.

I own a Fx impact M3 in .25cal, i have it tuned to shoot 39g slugs at 960fps, i have used the same tune since june 2021, everything internally is stock, Airmarksman backbone rail fitted,saber tactical front rail fitted etc. Recently i have noticed it sounds louder at the breech end, i changed the orings on the transfer port and the breech oring, but it still sounds a little louder than it used to, any ideas??.

Q-Tips?

 

[7Green]

Before you tear your gun down to pieces, diagnose that little oring first. Single load and a piece of tape. Never tear an Impact down that far on a whim. You might aggravate it.

Lmao. I have tore mine down a hundred times. Once you do it a few times it gets pretty quick and easy. That small oring at the end of the valve rod does require the most work out of all of them. I also learned the light valve return springs cause that oring to break far easier if you adjust the valve rod adjuster too much.