Opinion on 50bmg design
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Thread: Opinion on 50bmg design

  1. #1
    Gunco Member Warwickben's Avatar
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    Default Opinion on 50bmg design

    I've been looking at building a 50bmg single shot rifle for some time . I have the two common sets of plans you can find on the net .
    Searching around for info I came across the serbu RN-50. It uses a threaded breach cap .
    It seems like the easiest way to build a 50bmg rifle .
    Wanted to know what you guys think of it .
    What thread pitch would you use for the cap.

  2. #2
    No Hope For Me 1biggun's Avatar
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    IMO you can do better.
    I think the novelty of a 50BMG going bang will soon fade an you will be stuck with clumsy inaccurate weapon.

    If were going to build one if these ( im not)
    Id use a 16 pitch thread what ever size the blank OD is.
    Mosburg sells chambered blanls for about $175.

    A standard cal rifle with a take off barrel could likely be built for about $ 45

  3. #3
    aka: SDK1968 dutigaf's Avatar
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    Quote Originally Posted by Warwickben View Post
    I've been looking at building a 50bmg single shot rifle for some time . I have the two common sets of plans you can find on the net .
    Searching around for info I came across the serbu RN-50. It uses a threaded breach cap .
    It seems like the easiest way to build a 50bmg rifle .
    Wanted to know what you guys think of it .
    What thread pitch would you use for the cap.
    if by 2.... you mean Marks & the Holmes plans? id use Marks... he sells tons of these & they are made better than the Holmes plans.

    dont get me wrong, back when we first did the Homes plans? they were all there really was.. they made a functional, fairly ugly, clunky rifle in 50bmg...

    better advancements out there now.

    i still tell everyone who builds a 50bmg to use a tri lock head ... you only have to see 1 bi-lock head fail to never want to see that again. it takes your more machine time & better set up.. but your life is worth it.

    pic of bi lock....

    pic of tri lock...

    50 BMG receiver 022.jpg

    IMG_1303.jpg

    go for some version of TRI LOCK......
    say what you mean & mean what you say


    im here to build stuff.... not cry about "how things used to be"
    YES, i work for TEC Tactical.. 07/02 SOT

  4. #4
    Rcovering tangentialist stalker1's Avatar
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    It seems like a really cool idea to me. I was thinking about it recently. Fine threads or rotating interrupted coarse thread? Kinda a CZ 24-26 thought?

  5. #5
    Gunco Member Warwickben's Avatar
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    Default Opinion on 50bmg design

    Quote Originally Posted by dutigaf View Post
    if by 2.... you mean Marks & the Holmes plans? id use Marks... he sells tons of these & they are made better than the Holmes plans.

    dont get me wrong, back when we first did the Homes plans? they were all there really was.. they made a functional, fairly ugly, clunky rifle in 50bmg...

    better advancements out there now.

    i still tell everyone who builds a 50bmg to use a tri lock head ... you only have to see 1 bi-lock head fail to never want to see that again. it takes your more machine time & better set up.. but your life is worth it.

    pic of bi lock....

    pic of tri lock...

    50 BMG receiver 022.jpg

    IMG_1303.jpg

    go for some version of TRI LOCK......
    I wish I could buy a barrel extension
    And bolt head .
    My plan was todo some thing like this .

    So I would then need to thread the extension to match my barrel and make the rest of the recivier .
    I just don't have the indexing heads or rotary table to make the lugs my self sad face .

    I had a chance to buy a set dirt cheap but I forget what happen . If I remember right my debit card got stolen .

  6. #6
    Rcovering tangentialist stalker1's Avatar
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    Sorry I thought the question was about the threading only.IMHO about IMO. My bad!

  7. #7
    Gunco Member Warwickben's Avatar
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    Quote Originally Posted by stalker1 View Post
    It seems like a really cool idea to me. I was thinking about it recently. Fine threads or rotating interrupted coarse thread? Kinda a CZ 24-26 thought?
    I'm thinking of doing the threaded breach cap. Since it's pretty easy to pull off .
    But I got no idea what thread is safe .

  8. #8
    Rcovering tangentialist stalker1's Avatar
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    There are two trains of thought there. A "twist and turn" interrupted cap or a fine thread screw on cap. Even a coarse thread cap may have it's advantages. It's a 50 BMG being fired next to your head. Start with point a before going to point b please. Pressure and thrust. Not saying I haven't been thinking about.

  9. #9
    Gunco Member Warwickben's Avatar
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    Quote Originally Posted by stalker1 View Post
    There are two trains of thought there. A "twist and turn" interrupted cap or a fine thread screw on cap. Even a coarse thread cap may have it's advantages. It's a 50 BMG being fired next to your head. Start with point a before going to point b please. Pressure and thrust. Not saying I haven't been thinking about.
    I'm a far better machinist then a engineer lol .

  10. #10
    Rcovering tangentialist stalker1's Avatar
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    Do what everyone else has done. Borrow!

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