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Thread: Final say on O-ring for Mid-Length

  1. #11
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    Just curious, what bad things could happen if you left the o-ring in?
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  2. #12
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    I have an 18" middy with no O-ring. No problems so far with brass-cased ammo. I don't fire steel-cased from that rifle, but I have heard that is one reason why an O-ring might be necessary.

    I doubt there is any problem running with an O-ring installed, as long as you periodically take your bolt apart and clean the extractor. I guess it could collect gunk or break and foul the extractor, but I doubt that's very likely in a well maintained firearm.
    Last edited by sevenhelmet; 11-30-14 at 08:40.
    "We must, indeed, all hang together, or assuredly we shall all hang separately." -Benjamin Franklin

  3. #13
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    Quote Originally Posted by OIPactual View Post
    Just curious, what bad things could happen if you left the o-ring in?
    It becomes very brittle in cold temperatures. And I've seen then break in regular Florida heat (not because if the heat, mind you).

    As others have said, it was a bandaid for a using a spring that was designed for the rifle in a carbine. The colt copper washed spring that WS6 showed, the BCM spring, and the Springco CS 5 coil have all proven to NOT need a donut. I have used the Springco for years with great success. I have run a decent amount of steel cased ammo without incident.
    "That thing looks about as enjoyable as a bowl of exploding dicks." - Magic_Salad0892

    "The body cannot go where the mind has not already been."

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