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-   -   No bolt tip oring? (http://www.mcarterbrown.com/forums/tiberius-arms/216198-no-bolt-tip-oring.html)

Archanglmikel 10-16-2012 10:29 AM

No bolt tip oring?
 
Ok so I'm a bit of a Tib noob here, but why no oring on the tip of the 8.1 bolt? Wouldn't that seal the barrel at the firing point better than metal on metal? I was cleaning one I just picked up and noticed when I seat the bolt in the barrel I can see light around it. Thats got to kill the efficiency. Any ideas?

casper 10-17-2012 01:45 PM

Interesting never put much thought to that.

Jackson 10-17-2012 05:23 PM

Would it seal better? Of course.

However, the o-ring would add drag to the bolt, countering the efficiency gains.

Also, there isn't enough material in the bolt in that area to add an o-ring groove. It would require a new bolt design. You would have to decrease the flow path of the gas to gain enough space for an o-ring. That would also lower efficiency.

Additionally, the gas when leaving the bolt is being directed forwards. It has to turn 180 to escape between the bolt and barrel. So not much is escaping via this path.

Plenty of other markers lack an o-ring on the bolt tip. It isn't a critical component.

dirtraven1 10-23-2012 11:18 AM

like on a DM, the bolt o-ring is more to squeegie the eye pipe more than a function of sealing the air since the air/co2 is forced forward so very little is lost.


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