FX fx impact m4 first 10 shots are slow

LOL I'm just busting ya nuts; I could care less if it pings.
yea its 1:34 and I'm porting a set of cylinder heads cheers...
Yeah, even my Uragans have a plenum sound when I shoot them. But it’s not a ping like an unregulated gun. It’s slightly annoying. But not as annoying as having to do this with a new gun that costs $600 more.

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Quick update from my side. I own a M4 sniper and had the same slow 10-15 first shots. importer in the Netherlands would not admit a problem with the gun.. and decided to take it apart en inspect the valve rod.
lot of black gunk in the valvetube end and related orings.
Polished the valve rod, new orings, polished hammer spring, hammer and hammer weight. Light coat of silicone oil on the orings and ballistol on the hammer weight and spring…
First shots perfect and small spread…
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