FX fx impact m4 first 10 shots are slow

[milanilo]

hello

so i have an issue regarding my M4 first 10 shots are lower fps by almost 80 fps
then the gun shoots normally to my tuned fps ( 915 ) looks like it’s commonly issue with many m4 users .
when the gun rests for couple hours i have to shoot almost 10 shots before it settles again
any one having same issue?
if yes what did u do ?

 

[Billm67]

Shoot it some more...the valves need a little bit to break in.

 

[yarns]

Put nearly a 1000 pellets through my Fac Mk4 and still the same problem. It has been back to the dealer / UK importer 3 times and even they are at a loss. The one thing I would say is that the accuracy is still brilliant. FX need to understand what QC stands for. Hope they read this..... highly unlikely they will take any notice!!!!!

 

[88turbocoupe]

When new takes like 5 shots to warm up no biggie

 

[Airmanator]

What ppl don't understand is this is quite normal for all impacts. Not just the m4. This topic been posted like at least once a week lol. I own the mk2 and m3 and also have same problem. The slower shots is due to 2 things. One it's reg creep up. My my mk2 it's 5 bar creep. On my m3 its 10 bar creep. When pressure creep you get slower shots cause hammer have to work harder to open valve. The 2nd reason why shots are slow is valve rod sticking. You need to remove it and polish and clean it.

 

[yarns]

I think the problem is as stated, the valve rod needs polishing. Getting mine done next week by the UK importer (who happens to be a friend of mine). If that does not resolve the problem, then with a certain degree of reluctance, I am switching over to an FAC Huntsman!!!!

 

[Trucker3573]

When I had an m3 I tuned my max sweet spot velocity with the macro wheel set on 12-13. That way when I shot the gun cold I could put it on 16, giving it extra hammer strike to overcome the stiction. Wasn’t perfect but it did make the first slow shots not nearly as bad. Big design flaw of the platform that I don’t think will ever be addressed. With the length of the valve rod in the gun I’m not sure it’s even possible to eliminate for good.

 

[wooferocau]

hello

so i have an issue regarding my M4 first 10 shots are lower fps by almost 80 fps
then the gun shoots normally to my tuned fps ( 915 ) looks like it’s commonly issue with many m4 users .
when the gun rests for couple hours i have to shoot almost 10 shots before it settles again
any one having same issue?
if yes what did u do ?

It's an FX....get used to it..

 

[mubhaur]