Recent content by OTmachine

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    Tuning Can you Identify this air rifle

    https://www.jimmiedeesairguns.com/rifles/apache-airguns-part-2-the-apache-fireball-texan-1947-1949-by-the-national-cart-corporation/. And this:
  2. O

    Hi, new to the forum, checking in

    Welcome to the group!
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    Barrel band

    Did this for my 1st Gen Avenger, enabling the shroud to be clamped tight. 1st pic is the thinned down bolt and modified barrel nut. I cut through the rings where they intersect and drilled thru and counterbored to recess the nut and bolt heads. Helped lots!
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    A little help needed removing a very difficult to remove O Ring

    If you are trying to remove a Buna N o-ring that is located in / on a metal piece, you can use Brake Cleaner to soften the o-ring. You could use a Q-tip to apply it. Brake Cleaner attacks rubber making it soft and swell. Just make sure not to get it on areas that you do not want it on.
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    Crosman 140 fourth variant

    Big box stores use it for crating. Probably get some used banding for free in shipping departments, (Home Depot, Lowes, etc.)
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    Crosman 140 fourth variant

    You can fab one from black metal banding used for shipping.
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    Tuning Avenger hammer rotation

    I believe that there is a wire snap ring on the screw that can get hung up.
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    What makes some PCPs so expensive?

    Have not considered buying one of the higher priced PCP’s. I have the tools, the skills, the ability to learn, which pretty much enables me or others to make or upgrade a suitable PCP. I have a variety of Airguns, which are great for tinkering. Kind of running out of room. If I really need...
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    Last question on hand pumping

    Yes. But to make the Avenger last longer, I go to 250 bar. Anything above that is not needed as I only have 4 mags. I will be 70 this year.
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    Last question on hand pumping

    I weigh 196 lb. At 300 bar my feet do Not come off the ground. If they did, I would have to fix a sticking check valve in my pump. Hand pump works fine for me. I regularly fill to 250 bar on my Avenger. Takes about 100 strokes to refill when I stay at reg setting of 2200. Gets me 32 shots...
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    What is a "Cheap" gun - Cost of modifying an Avenger and a Modified Crosman 2240

    I, applaud the OP! IMO, it is kinda like buying anything made in China. You pretty much have to go thru it and clean it up, removing burrs, polishing surfaces, fixing little inaccuracies from the manufacturing / engineering process. It is a Good learning experience, and pretty enjoyable to...
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    Tuning Power block oring sizes?

    I am guessing that you do not have a way to measure the o-ring groove diameter and the corresponding mating surface diameter? Not too hard to figure once you get some “real” measurements. My .02
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    Tuning Old Crosman pumper needs repaired

    As in “Mike Baker” BTW, Nice looking 102
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    Tuning What to do with a QB78?

    Great, cheap gun to tinker with!
  15. O

    How do I fix this? Need some creative help.

    FYI, # size screw diameter. Number size of screw X .013” + .060” 10 X .013 + .060 = .190” HTH
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