Page 1 of 5 1 2 3 4 5 LastLast
Results 1 to 10 of 44

Thread: fmk 3 pics?

  1. #1
    Gunco Regular akfiend's Avatar
    Join Date
    Mar 2010
    Posts
    458
    Feedback Score
    0

    Default fmk 3 pics?

    I have suddenly found myself very interested in the fmk 3 and parts kits are plentiful. the recoil spring isnt behind the bolt so this would make a hammer or striker setup alot easier. BUT theres not many detailed pictures on the web. If anyone here has a parts kit I would really apreciate some close up pics of the bolt from several angles and some pics of the lower receiver from a top view and also how does the barrel nut attatch? is the receiver threaded at the front?

  2. #2
    GuncoHolic Rahatlakhoom's Avatar
    Join Date
    Jan 2005
    Location
    Indiana
    Posts
    2,317
    Feedback Score
    14 (100%)

    Default

    I was just looking at these kits.
    I want to get one.
    Very much an Uzi type design.
    I was thinking striker fired also.
    Pistol build definitely.

    Just need monetary liquidity.
    Charter member-Busted Box Club est. 2006

    "I will adhere to the Patriot Act, the one signed in 1776"
    - Marc Anderson

  3. #3
    Gunco Regular akfiend's Avatar
    Join Date
    Mar 2010
    Posts
    458
    Feedback Score
    0

    Default

    Same here. I really cant justify getting one since i just finished my uzi but i still want one just to build something. Im really suprised that not alot of people build fmk's theres literally no info on the web. but i was thinking take a page out of the uzi book and have the firing pin fixed to the striker

  4. #4
    GuncoHolic Rahatlakhoom's Avatar
    Join Date
    Jan 2005
    Location
    Indiana
    Posts
    2,317
    Feedback Score
    14 (100%)

    Default

    I found some pics of the FMK bolt.
    This is a long piece.







    Looks like room for a striker system. Twin spring rods perhaps that
    reset each cycle. I don't know yet how much room is behind the bolt when
    in battery, but I'm guessing a few inches. It's a great looking subgun and I
    think it would be a fun project. Hellbox Armory has tubes for this, although
    I shop around at Aircraft Spruce for 4130 tubing, less expensive.

    Hellbox's tubes are fluted to resemble the original.
    HellBox Armory: FMK-3
    Charter member-Busted Box Club est. 2006

    "I will adhere to the Patriot Act, the one signed in 1776"
    - Marc Anderson

  5. #5
    Gunco Regular akfiend's Avatar
    Join Date
    Mar 2010
    Posts
    458
    Feedback Score
    0

    Default

    thanks! looks like it would be really easy to screw up and drill into the ejector slot while drilling for the firing pin. I agree they are cool looking kinda like a cross between a sten and an uzi. any idea what the inner diameter of the receiver is? I think reduced inner diameter would be the way to go.

  6. #6
    GuncoHolic Rahatlakhoom's Avatar
    Join Date
    Jan 2005
    Location
    Indiana
    Posts
    2,317
    Feedback Score
    14 (100%)

    Default

    That ejector slot does look excessively deep.
    Might have to bore out a 1/4" hole, cut into the slot and
    make a firing pin insert. File down the ejector a bit for a smaller slot.

    The ID on the tube is 1.416", running about .20" wider inside the
    fluted area on the left and right side.

    Reduced diameter tube means turning down the bolt.
    I don't like the looks of those spidery side arms running up to
    the barrel recoil thingy. An option might be to install a denial pin or
    block.

    Again, the actual parts will give more clarity.
    I see What a Country lists them for 209.00
    Charter member-Busted Box Club est. 2006

    "I will adhere to the Patriot Act, the one signed in 1776"
    - Marc Anderson

  7. #7
    Gunco Regular akfiend's Avatar
    Join Date
    Mar 2010
    Posts
    458
    Feedback Score
    0

    Default

    thats why i was looking into it because whatacountry has a good deal on them. thats a good idea using a sleeve for the firing pin. It apears to me that the bolt is made of two parts the bolt and the telescoping sleeve it rides in. might be easier to drill if you took them apart. of course the best thing to do would be have someone with an EDM machine make the hole but that would probably cost a pretty penny. now the receiver flutes are no big deal to me. I would just as soon use regular tube with the right ID.

  8. #8
    GuncoHolic Rahatlakhoom's Avatar
    Join Date
    Jan 2005
    Location
    Indiana
    Posts
    2,317
    Feedback Score
    14 (100%)

    Default

    I've got a mini mill that could probably handle coring out the bolt.
    The last 4130 tubing I got was 1.50" ID, so this might be close enough.
    I think I will check fit first.
    Firing pin may have to be fabbed to fit.
    I can do this on mini lathe.
    AK gas pistons make good firing pin stock.

    I'm just going to have to bite the bullet and order a kit.
    It's starting to look like way too much fun.
    Charter member-Busted Box Club est. 2006

    "I will adhere to the Patriot Act, the one signed in 1776"
    - Marc Anderson

  9. #9
    Gunco Regular akfiend's Avatar
    Join Date
    Mar 2010
    Posts
    458
    Feedback Score
    0

    Default

    I was thinking of using an ak gas piston! I have an extra one anyways. the tubing i was looking at online was 1.625'' OD 1.375 ID and 0.125 wall idk if thats too much wall thickness or not. but thats if you wanna go reduced ID instead of denial bar. I just got a milling machine for christmas and i've been wanting a project for it but i better practice with it first!

  10. #10
    GuncoHolic Rahatlakhoom's Avatar
    Join Date
    Jan 2005
    Location
    Indiana
    Posts
    2,317
    Feedback Score
    14 (100%)

    Default

    .125" wall thickness is double the normal subgun wall.
    It would work fine, just heavier.

    The mill sounds fun. I first got mine I practiced cutting wood
    just to get a feel. I'm still a novice on a machine, but I eventually
    get there.
    Charter member-Busted Box Club est. 2006

    "I will adhere to the Patriot Act, the one signed in 1776"
    - Marc Anderson

Page 1 of 5 1 2 3 4 5 LastLast

Search tags for this page

There are currently no search engine referrals.
Click on a term to search our site for related topics.

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •