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Old 03-07-2013, 09:32 AM #1
Join Date: Sep 2004
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DM12 Special O-Ring?

So, the other day, I took apart my DM12's bolt, and I took out the #4 Cylinder Internal o-ring( I think this is the right one anyways.. ).

Anyways, I noticed that the stock o-ring has square edges. Is this normal? The manual talks about just a normal 017 o-ring there. Has anyone replaced the stock one with a regular, rounded edge o-ring and been able to tell any difference?

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Old 03-07-2013, 09:57 AM #2
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I don't have my bolt in front of me, is that the blue oring? I just use the orings in the repair kit and don't have issues.
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Old 03-08-2013, 05:02 PM #3
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Originally Posted by DarkRipper View Post
I don't have my bolt in front of me, is that the blue oring? I just use the orings in the repair kit and don't have issues.
No the blue one is a 014, the one he's referring to is a orange 017.

and No it's not a speical kind of oring, a regular 017 will work fine.. as to why yours is square edged im not too sure, may be a bad oring? you shouldn't need to replace it unless it's leaking

there is like 2-4 in your dm12 parts kit. most all orings you need to rebuild your bolt is going to be in the dm12 parts kit that came with the gun
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