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Old 07-06-2012, 11:34 AM   #1 (permalink)
Wait, what?
 
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Breaking Bolt O-Rings (Piranha GTi+)

My brother in law has a Piranha GTi+ Rampage. He's had 3 or 4 broken bolt o-rings now (the front one, nearest the breech) so I'm wondering what I should be looking at. Maybe the feedneck not sitting right somehow? Thoughts?
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Old 07-06-2012, 11:38 AM   #2 (permalink)
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Might have answered my own question; he has a bad habit of leaving broken paint in the gun. Is it possible that the o-ring is swelling between uses?
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Originally Posted by Hooligan
I found a way to make a sabot for a twinkie. The other tanks smell like banana cream filling now.

FS: Ultimate Kingman Hammer ($120), optional Freak Kit

FS: Like New Valken V-Max 2 ($45 shipped)

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Old 07-06-2012, 11:39 AM   #3 (permalink)
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Possibly due to the old paint shells getting in there. What orings are you using to replace the broken ones with? How old are they?
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Old 07-06-2012, 11:45 AM   #4 (permalink)
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Bottle o-rings, and new. The FAQ's I've found online say that bottle o-rings are fine but ideally you use a softer version; alas, I don't have time to hunt those down before we play tomorrow (guess who will be up tech'ing guns until past midnight, lol).
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Originally Posted by Hooligan
I found a way to make a sabot for a twinkie. The other tanks smell like banana cream filling now.

FS: Ultimate Kingman Hammer ($120), optional Freak Kit

FS: Like New Valken V-Max 2 ($45 shipped)

Feedback
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Old 07-06-2012, 11:46 AM   #5 (permalink)
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It could be dirty, but when you clean it up...

Look for burrs in the bore in that area. Iirc, the feed neck and the detent should be the only possibilities. The detent hole might be a problem, or the detent cover screw may be protruding into the bore.

If it breaks a lot of paint, the o-ring may just be another symptom of a burr or misalignment in the bolt.
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Old 07-06-2012, 11:58 AM   #6 (permalink)
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Good thinking. I'll pull the back block and see if either of the eye/detente cover screws are protruding (and/or if there's a burr).
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Quote:
Originally Posted by Hooligan
I found a way to make a sabot for a twinkie. The other tanks smell like banana cream filling now.

FS: Ultimate Kingman Hammer ($120), optional Freak Kit

FS: Like New Valken V-Max 2 ($45 shipped)

Feedback
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Old 07-06-2012, 05:18 PM   #7 (permalink)
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Quote:
Originally Posted by Spider! View Post
It could be dirty, but when you clean it up...

Look for burrs in the bore in that area. Iirc, the feed neck and the detent should be the only possibilities. The detent hole might be a problem, or the detent cover screw may be protruding into the bore.

If it breaks a lot of paint, the o-ring may just be another symptom of a burr or misalignment in the bolt.
I always forget about the eye cover screws...Great call!
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Old 07-09-2012, 02:00 PM   #8 (permalink)
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Is that O-ring really necessary anyway?
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Old 07-09-2012, 02:02 PM   #9 (permalink)
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Dunno - stops blowback, I guess. Mainly it chops like a mother when there's a broken o-ring floating around in there.

Gun's in my possession now, gonna take a look ASAP.
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Originally Posted by Hooligan
I found a way to make a sabot for a twinkie. The other tanks smell like banana cream filling now.

FS: Ultimate Kingman Hammer ($120), optional Freak Kit

FS: Like New Valken V-Max 2 ($45 shipped)

Feedback
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