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Thread: 9mm and rimfire bolt action

  1. #1
    Member xring's Avatar
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    9mm and rimfire bolt action

    Hey guys. I may probably have finished my this project. I just need to polish it and can call it done. I designed everything in Solidworks except for the back bolt and a good friend of mine that has a CNC shop (shooter too) made it for me. Soon will send it out to have 2 barrels made. It's a 22LR and 9mm single shot action receiver using one action only: just change out firing pins, ejectors and front bolts (course, and barrels) and I am good to go, hopefully.
    Made out of 17-4PH, 3D printed titanium bolt stop, 3 aluminium trigger hangers Rem 700 type with different cross pins spacing for more/less cock on close.
    Hope you guys like it
    More to come.

    Cheers
    MFG

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    veitnamcam, R93, ebf and 10 others like this.

  2. #2
    OPCz Rushy's Avatar
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    You buggers never cease to amaze me. I couldn't make a bed if my life depended on it yet here you are making bits for firearms.
    WallyR and Blisters like this.
    It takes 43 muscle's to frown and 17 to smile, but only 3 for proper trigger pull.
    What more do we need? If we are above ground and breathing the rest is up to us!
    Rule 1: Treat every firearm as loaded
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  3. #3
    Member Marty Henry's Avatar
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    Clever bugger!

  4. #4
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    Quote Originally Posted by Rushy View Post
    You buggers never cease to amaze me. I couldn't make a bed if my life depended on it yet here you are making bits for firearms.
    Technically that particular bit is considered A firearm, not a bit of one....

    Either way, it is awesome to see people developing these ideas. Would love to see the finished product.

  5. #5
    ebf
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    little liberal gnome ebf's Avatar
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    Awesome

    Would love to see more details about your software and machine setup.

    What is the reason for the bolts top to be printed and the rest CNC ?
    Last edited by ebf; 06-09-2018 at 10:41 AM.
    Viva la Howa ! R.I.P. Toby

  6. #6
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    Nice work! I am looking forward to the rest of it.

  7. #7
    Member xring's Avatar
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    hey guys, thanks for the comments.

    ebf, the bolt STOP was 3D printed. Cheap, quick and lightweight and made to my specs. My friend has a CNC shop and I just designed it. Somewhat based on the Rem 40-X rimfire, but way shorter. And the raceways wont go all the way thru the receiver. It stops halfway in and done by sink EDM. Solidworks... nothing special.

    need critics from everyone here, either bad or good, so I can improve it.

    cheers

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  8. #8
    Member xring's Avatar
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    front bolt of the 9mm

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  9. #9
    ebf
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    little liberal gnome ebf's Avatar
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    very clever, i like the mid-locking design.

    what is the longest case you could theoretically use with that setup ?

    is the lug locking recess cut using EDM as well ?

    using the same firing pin for both bolts ? so, offset bore for the rimfire ?

    how does the bolt swap mechanism work ? I can see a groove on the rear of both bolt heads, but nit sure how it is retained in the bolt body. hope that makes sense.
    Viva la Howa ! R.I.P. Toby

  10. #10
    Member Wingman's Avatar
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    I can see a major flaw with it... its fixable but its not a small job...



    ......you didnt make a second 9mm one for me.....
    Gerbs, Tommy and timattalon like this.

  11. #11
    ebf
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    @Wingman, get in line, he needs to work on the left-handed prototype first
    Viva la Howa ! R.I.P. Toby

  12. #12
    Member xring's Avatar
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    hey guys, thanks for that!!!
    I can make it work for any pistol case as well, but I would have to full length wire EDM and make the tenon larger in diametre.
    of course, adjust the extraction window and ejectors. locking lugs made by machining with a long carbide tool. different firing pins.
    for the front bolt swap, there are 2 little holes and cross pins pins on the back bolt lugs that hold them together, but allows me to rotate the bolt freely.
    the rimfire bolt is a PTG 40-X bolt.
    I have another project that I can post soon if there's enough interest.
    cheers

  13. #13
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    Thanks so much for posting the pics. I use solidworks too and really like it. You're lucky to have a friend with a machine shop!

  14. #14
    Member Cordite's Avatar
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    Good idea to make rear locking to decrease bolt travel. How about dispensing with the bolt handle? (-:

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    Guns don't kill people - drivers do.

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  15. #15
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    Quote Originally Posted by Cordite View Post
    Good idea to make rear locking to decrease bolt travel. How about dispensing with the bolt handle? (-:

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    Just like these ones I am making?
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