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FrankW 05-23-2013 12:58 PM

Small leak down the barrel after first shot
When I air up my DM6 there's no leak. After the first shot I can hear a leak coming out of the barrel. I tried adjusting the LPR to both extremes while taking a shot at different settings, that doesn't seem to affect it. I also tried adjusting the HPR to see if that does anything and that didn't help either. I replaced a few o-rings on the bolt, but maybe I just haven't found right one yet?

Any ideas?

FrankW 05-24-2013 02:28 AM

Ok, does this seem like a reasonable theory?

It looks like the area around the tip of the bolt has some damage. Does it sound reasonable that the wear there is causing the oring in the front of the cylinder to fail to fully seal?

I tried turning down the lpr and pushing the bolt forward a little from the back. Seems like after about an 1/8th of an inch the leaking stops.

Does this happen, or does this sound ridiculously unheard of? And what causes that wear? Looks like someone took a wrench to it, but I guess it's from the detent maybe? Here's some pics... with

FrankW 05-28-2013 03:54 PM

Just wanted to close out the thread on this.

It turns out that it is the damage to the bolt tip that's causing the leak. The 017 o-ring isn't able to keep it sealed.

I got a couple of different 017 o-rings from paintballgateway, one of them having kind of a square cross section. I put that one in with some dow33 and the leak stopped. I'm thinking that the o-ring causes a little more drag, but at least it doesn't leak anymore.

I have a new bolt coming, but I played a day with the square o-ring and it worked like a champ.

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