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Old 11-12-2007, 07:49 AM
CKvBP CKvBP is offline
New Guy
Join Date: Jun 2007
Posts: 41
Default Re: Installed Regulator cant get above 240fps?

Originally Posted by ViperX
Unfortunately that is common with the MR2, It's the metal guide on the bolt that is slamming into that groove everytime the marker is fired and causes a bur to form and that is what's scratching your bolt up. You'll have to carefully file the bur away and I would recommend taking a dremel and grinding away the front and sides of the base of the metal guide.

Just look down your bolt from the rear and you will see how the base is squared off and not rounded with the bolt an instead protrudes up outside the circumference of the bolt. That's the area that is causing the bur inside the bolt chamber. I grinded mine away with a small dremel bit.
Cool thats exactly what I figured was happening. I'll bust out my dremel and work on it.

were you seeing any function loss from your marker due to this? or just the scratched bolt?
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Old 11-12-2007, 11:36 AM
chnk's Avatar
chnk chnk is offline
Mountian Dew sponsored
Join Date: Jul 2007
Posts: 944
Default Re: Installed Regulator cant get above 240fps?

Originally Posted by CKvBP
can you recommend a HP Valve?

I Also got around to cleaning my gun this evening, there was a lot of junk on the bolt and it seemed like it was jammed in there and lots of material from the bolt floating around in it, not sure whats causing that. even after cleaning it didn't want to go back into the gun smoothly. I dont recall this being an issue before. I know scratches on the bolt are common, but shouldnt it go in smoothly and out smoothly with a few clicks of the trigger? I had to force it out!

It seems the point of resistance is at the very end of the grove that the cocking pull mechanism fits. seems like a bit of metal is sticking down into the bore.
a new designz it pretty good and inst too expensive,

you could get a rocket valve, if you're willing to put out the cash and go ahead and tune it to low pressure
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