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MonnoncMaxou · July 22nd, 2012, 11:07

Hi,
I have a feeling this one is simple but I'm looking for second opinions. After a spring downgrade on a KA M4, I've been observing the following on chrono:

1st shot solid 330FPS
2nd 275FPS
3rd 220 FPS
4rd 170FPS
5th 120FPS
6th 97 FPS

The last shot seemed to skip. As if the gear went under the tappet plate and grabbed it on the way back.

and then the cycle restarts at 330ish and goes down again for a few shots.

I was suggested by a friend who has some experience with AEGs to replace piston o-rings.

Anyone else has an idea?

July 22nd, 2012, 11:07	#1
MonnoncMaxou Trader rating Join Date: May 2012 Location: Montréal	KA M4 AEG losing power every shot Hi, I have a feeling this one is simple but I'm looking for second opinions. After a spring downgrade on a KA M4, I've been observing the following on chrono: 1st shot solid 330FPS 2nd 275FPS 3rd 220 FPS 4rd 170FPS 5th 120FPS 6th 97 FPS The last shot seemed to skip. As if the gear went under the tappet plate and grabbed it on the way back. and then the cycle restarts at 330ish and goes down again for a few shots. I was suggested by a friend who has some experience with AEGs to replace piston o-rings. Anyone else has an idea? Last edited by MonnoncMaxou; July 22nd, 2012 at 11:10..