Page 1 of 2 1 2 LastLast
Results 1 to 10 of 13

Thread: S20 underfolder conversion

  1. #1
    Gunco Regular voland's Avatar
    Join Date
    May 2005
    Posts
    401
    Feedback Score
    11 (100%)

    Default S20 underfolder conversion



    Had some build time this weekend, and finished a long anticipated project of mine. This is a Saiga 20 converted to an underfolder.

    In the end the conversion was easier that I thought, but I do have the right tools now. I used a mill to get rid of all the rivets on the factory rear trunnion and on the scope rail. I used a polish made rear underfolder trunnion, it lined up perfectly with the receiver and the long rivet hole. The Yugo M92 trunnion I tried before did not line up.

    I used a HF TIG to weld up all the holes, except for the long rivet hole. The remaining rivet holes for the rear trunnion were then drilled and the trunnion was used to scribe the UF pivot hole layout.



    I then riveted the trunnion in place and milled out the underfolder pivot holes. I made them undersized and then filed for a precise fit with my stock, no wobble at all. I used an 11/16 HSS mill bit for the large hole.



    All that is left now is to bead blast, park and duracoat.

    Any suggestions on how to smooth out the weld bead on the closed holes.

  2. #2
    No Hope For Me Coils's Avatar
    Join Date
    Feb 2005
    Location
    PA Where the Amish Roam Free
    Posts
    14,026
    Feedback Score
    38 (100%)

    Default

    Nice, thanks for the pics.
    Also don't forgot to let us know how it feels when you shoot it.

    Any suggestions on how to smooth out the weld bead on the closed holes.
    I used one of those flap style sanding discs on the angle grinder to take off the bulk of it, like this but I think I used a 120 or 180
    - Harbor Freight Tools - Quality Tools at the Lowest Prices

    Which TIG do you have, the little red one or the one with the digital readout like this?
    - Harbor Freight Tools - Quality Tools at the Lowest Prices
    "Government is not the solution to our problem, government is the problem" Ronald Reagan

  3. #3
    Gunco Regular voland's Avatar
    Join Date
    May 2005
    Posts
    401
    Feedback Score
    11 (100%)

    Default

    Quote Originally Posted by Coils View Post

    Which TIG do you have, the little red one or the one with the digital readout like this?
    - Harbor Freight Tools - Quality Tools at the Lowest Prices
    I have the tig in the link. So far it has treated me well, I did this conversion, as well as some other builds with it. The one upgrade I would recommend is to get a foot pedal, I do not have one.

    I will get the sanding disk. Thanks for the suggestion.

  4. #4
    Gunco Member SAR4's Avatar
    Join Date
    Feb 2010
    Location
    New Hampshire
    Posts
    27
    Feedback Score
    0

    Default

    Very nice looking conversion. How high of a capacity magazine can you use and still be able to operate the stock?

  5. #5
    Gunco Regular voland's Avatar
    Join Date
    May 2005
    Posts
    401
    Feedback Score
    11 (100%)

    Default

    Quote Originally Posted by SAR4 View Post
    Very nice looking conversion. How high of a capacity magazine can you use and still be able to operate the stock?
    I only have 5 round mags and they clear just fine. You can probably clear an 8 round, but I doubt you will clear a 10.

  6. #6
    No Hope For Me Coils's Avatar
    Join Date
    Feb 2005
    Location
    PA Where the Amish Roam Free
    Posts
    14,026
    Feedback Score
    38 (100%)

    Default

    First, sorry for side tracking your thread.

    Does that TIG have a push button on the torch to start it?
    I ask because I got one of the cheaper ones and it's a "scratch or touch start" and I keep contaminated the tungsten when first starting an arc.
    I think I'd be able to use one like this easier then the one I got.

    Thanks in advance
    "Government is not the solution to our problem, government is the problem" Ronald Reagan

  7. #7
    Gunco Regular voland's Avatar
    Join Date
    May 2005
    Posts
    401
    Feedback Score
    11 (100%)

    Default

    Colis, there is a start button on the torch, makes starting an arc very easy. For the money the unit is pretty decent.

  8. #8
    No Hope For Me Coils's Avatar
    Join Date
    Feb 2005
    Location
    PA Where the Amish Roam Free
    Posts
    14,026
    Feedback Score
    38 (100%)

    Default

    Thanks again.
    I might pick one of these up later, I never see that one on sale but I keep finding the 20% coupons so that will help.
    OK I'm done asking about the welder, let's get this thread back on track
    "Government is not the solution to our problem, government is the problem" Ronald Reagan

  9. #9
    Gunco Member Nitris's Avatar
    Join Date
    Jan 2008
    Posts
    26
    Feedback Score
    0

    Default

    That is beautiful.............Gotta make mine an underfolder.

  10. #10
    Gunco Regular voland's Avatar
    Join Date
    May 2005
    Posts
    401
    Feedback Score
    11 (100%)

    Default Got to shoot it

    Got to shoot the bejezzus out of my S20 in the past couple weeks. Have about 200 rounds down range, eats everything except the cheap ass walmart birdshot. Had a chance to shoot the S20 side by side with a converted S12 too. I gotta say I like the S20 better, less recoil, faster shooting. firing with the folded stock is fun. This one is a keeper. Now to hunt down more mags, and make some hi-caps.

    I refinished it with a 50/50 mix of FN green and tactical green duracoat, I like the color.


Page 1 of 2 1 2 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
  •