Third Homebuilt Gun Of The Winter — DONE! —

Home Forums General Mods/Machinists Third Homebuilt Gun Of The Winter — DONE! —

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  • #1923
    mm123522
    Participant

    I just finished the third (and last) homebuilt gun of this winter.
    .25 cal. , 24 inch LW barrel, Extra long shroud.
    Extra high scope mount to see over a 4500 psi, 68 cubic inch tank.
    Easily makes 1050 FPS with 31 grain Kodiaks.
    Home anodised. Homebuilt grips.
    Two stage trigger.
    Push on / Push off , brass safety button.
    Extra strong, threaded on muzzle end plug.
    Leapers 50 MM, 16 power, AO scope.

    I have not got it out to the woods yet, maybe this weekend.
    I still need to work on the trigger pull, its a little heavy, at 6 pounds.
    Gotta profile and polish the sear.
    I am still learning on the anodising, as you can see.
    Cocking action is Smooth!
    I should be able to get a lot of high power shots from the BIG tank,

    Mark

    #37528
    walkonking
    Participant

    Congratulations that is great.

    Now go fourth and build another 😛

    #37548
    photo22
    Participant

    WOW that is mean looking and I like it!!! 😀

    #37674
    rich
    Participant

    That looks pretty mean.. Just the tool for cleaning out the wood chucks.

    Cheers,
    Rich

    #37692
    mm123522
    Participant

    Thanks Guys!

    The fit, finish, and anodizing turned out good on the trigger housing. If you notice, the trigger guard is a lighter color than the trigger housing. I think my acid and/or dye baths were getting old / used up. The barrel shroud is a dark metalic gray / green. I used the same acid and black RIT dye. The barrel shroud was last to be anodized and it turned out the lightest color.

    Put a “hotter” valve on the carbon fiber tank. It sends 31 grain Kodiaks down range at 1150 FPS for 90 FPE. You can hear the supersonic crackk!!Way more power than I need or want!! Was using a 3200 PSI fill – can still go up on the pressure.

    More pictures:

    #38097
    mm123522
    Participant

    Follow up report.

    I been playing with hammer weight. Adjusted the hammer to produce 975 FPS maximum, with 31 grain kodiaks @ 2800 PSI.

    Today I filled it to 3200 PSI, and shot two test shots @ about 950 FPS.
    Then took it out into the woods and shot another 42 shots.
    When I got home I shot another 2 shots @ about 935 FPS.
    Checked the pressure and it was 2500 PSI, thats 46 shots @ about 60+ FPE, and only using 700 PSI.
    It looks like it will give about 60 full power shots on a fill.

    Very quiet at this power level.
    Producing 1 inch groups at 50 yards.

    Mark

    #38099
    shrpshotr28
    Participant

    That is awesome. 💡 Now for a valve w/ regulator set to about 2600psi. You could use the full 4500 fill capacity and probably get upwards of 175 full power shots. 😈 😀

    Great job.

    #38101
    mm123522
    Participant

    shrpshotr28:

    Yah your right! A regulator would capture the additional capacity of the tank. I am not sure I’am up to building the regulator — McMike!!

    Mark

    #38102
    shrpshotr28
    Participant

    Look for “in tank regulator” in the quick ref section. Some really good ideas.

    #38103
    jezx
    Participant

    looks great , all the pictures . nice idea with the grip .

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