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Old 02-26-2012, 02:09 AM #1
oRingaDingDing
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Buna O rings in an Automag

To Mag experts:

I have was just curious, can Buna O rings be used in an automag? I know a good deal about classic guns but mags are not one of them. Urethane o rings are not cheap.

Thanks in advance
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Old 02-26-2012, 08:17 AM #2
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They work but you need to get the sizes just right or it'll be leak city
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Old 02-26-2012, 08:45 AM #3
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the orings agd use are of a better quality than other companys. idk if i would want to swtch to another kind. the have been known to last more than a decade without being changed. why change what works
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Old 02-26-2012, 09:36 AM #4
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Probably cuz he wants to sell mag o ring kits... yes you could use buna, but like dmex said they have to be sized perfect and don't last as long
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Old 02-26-2012, 01:08 PM #5
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First, sorry for the horrid grammar in my post, I was using my phone. Second, I was just curious it is a question which I am asked.quite often.
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Old 02-28-2012, 12:04 AM #6
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They should work; it's not like the mag has critical tolerances for most of them.

Some of you with really, really old parts kits will notice that they're not all urethane.

The o-rings I would be worried about would be the ones under the most movement.

Also, the o-ring set varies depending on which marker you're talking about.
  • power tube or L10 spacer o-ring
  • regulator piston o-rings
  • on/off o-ring (although earlier they were non-teflon, and even the ULT uses non-teflon because they can't get it in the right size)

The rest I don't think are a big deal.
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Old 02-28-2012, 12:25 AM #7
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Quote:
Originally Posted by GoatBoy View Post
They should work; it's not like the mag has critical tolerances for most of them.

Some of you with really, really old parts kits will notice that they're not all urethane.

The o-rings I would be worried about would be the ones under the most movement.

Also, the o-ring set varies depending on which marker you're talking about.
  • power tube or L10 spacer o-ring
  • regulator piston o-rings
  • on/off o-ring (although earlier they were non-teflon, and even the ULT uses non-teflon because they can't get it in the right size)

The rest I don't think are a big deal.
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Old 02-28-2012, 12:28 AM #8
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If you are running co2 then no. If HPA then yes.
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Old 02-28-2012, 09:13 AM #9
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I’ve had luck using Buna for the L10 o-ring but they don’t last very long.

Have had trouble with the older classic and retro on/off’s. Never tried Buna it in the ULT or RT on/off’s.
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Old 02-28-2012, 09:33 AM #10
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Well I do know that Co2 plays havoc with Buna and a lot of Co2 based guns use Poly o rings. I just wasnt sure exactly how they would work in a mag being that almost every o ring in them is PTFE or PU. I have a lot of people asking me for a kit but I can not buy exotic seals in bulk yet, they are just too expensive until I can order a lot of them.
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Old 02-28-2012, 08:23 PM #11
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Quote:
Originally Posted by oRingaDingDing View Post
Well I do know that Co2 plays havoc with Buna and a lot of Co2 based guns use Poly o rings. I just wasnt sure exactly how they would work in a mag being that almost every o ring in them is PTFE or PU. I have a lot of people asking me for a kit but I can not buy exotic seals in bulk yet, they are just too expensive until I can order a lot of them.
Well, the problem is if someone asks for o-rings, it's most likely one of the o-rings that I mentioned as they actually might wear down -- power tube/L10, on/off, and reg piston o-rings. Those are exactly the o-rings that probably won't do well with buna, particularly the power tube/L1.

All of the o-rings are PU/PTFE (where possible) because AGD's just crazy like that. It's the same company that brought you carbide sears and reg bodies that could take 3000PSI input. I mean, it's not like the barrel o-rings need to be PU, right?
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Old 10-06-2015, 11:56 AM #12
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Sorry to revive an old thread but are polyurethane and urethane o-rings the same thing? I've been trying to buy a urethane oring kit but can only find polyurethane kits.
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Old 10-09-2015, 08:21 AM #13
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Yes, they're the same.
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Old 10-30-2015, 10:23 AM #14
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Yes, they're the same.
sweet, thanks! I could not find a solid answer.
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Old 11-04-2015, 08:10 AM #15
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I have NEVER seen a mag with the wrong orings work properly. Not once. Don't be penny wise and dollar foolish. Buy the right orings for petes sake.
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