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Crossman Mark 1 CO2 Pellet Gun

I live in Huntsville, Ontario, Canada.
Any idea where I can get a set of O-rings for my Crossman Mark 1 Target 22?
Ser no. 965342 (about 35 years old or more)
Walter Hogg

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  • reeta396 Aug 21, 2008

    Can't find where to buy parts for the gun.

  • mistom08 Oct 22, 2008

    I have the same problem for my mark 2 .177 O ring in bottom is leaking out gas.

  • vanminos1 Oct 29, 2008

    I need o rings as well ! My Dad's old gun. Did anyone find replacements or did you have to improvise??

  • walthogg Nov 21, 2008

    Thanks for the correction.

  • Anonymous Dec 01, 2008

    You need a special pair of (reverse) pliers (cheap) to remove the retainer clip to get at that small o-ring..


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Check out Tim can sell you the o-rings or customize your gun to another level (see the LD pistol).


Posted on Nov 19, 2008

  • scordani Nov 21, 2008

    correction to solution:

    web address should be


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I have a Mark I that I took apart and was able to replace all o-rings with bulk ones found in the hardware store.  However, I could not change the one for the needle in the valve, and it still leaks.
So, you could contact Mac1 out of the US at
He would be of help as he modifies these things and has full parts kits available.
Mine is a pre-1975 unit and works well except for the leaking.

Posted on Dec 01, 2008

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Email crosman...come on guys!

Posted on May 13, 2009

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357 crossman gas leaking

Posted on Apr 17, 2009

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Posted on Jan 02, 2017

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