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Thread: Want to use Polish blank on second build question?

  1. #1
    NoWorkCamp4Me railbuggy's Avatar
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    Default Want to use Polish blank on second build question?

    I have a NDS-1 receiver with all holes drilled for a romy g kit I bought years ago. Now I want to save it as I bought four of the Polish blanks from Misty.I also made copys of the Ace AK47 template to help line up the holes.My question is if the holes are off center a little(1.5mm or less) will the build still function?
    Two jigs I built back in 2007.
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    SOON-We already lost the war. You are the resistance.

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    GuncoHolic Sprat's Avatar
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    personally I have found the trunnions holes could be off from build to build and kit from kit if the pictures are correct then some of the hole locations are present IE the trigger hole
    I will use a flat as a guide I always drill with undersize bits and open very slowly, I am not a big fan of jigs as absolute locations
    take your time

    sure others will post their thoughts

    sprat
    Sprat and sprat1 are one and the same.

  3. #3
    Scheiße. Mr_Posthumous's Avatar
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    The only problems I have had with holes in receivers not matching trunnion holes is that once riveted, the receiver could warp/twist a bit. I have had to "oval out" some holes if they dont match up just right. As long as the rivet covers it, and the rivet head isnt going to go through the hole, you should be good. my 2 pennies.

    I use the masking tape locating method... Put the tape on the trunnion side, mark the holes on the tape, take the tape off, put the trunnion in the receiver, put the tape on the outside of the receiver lined up as close as you had it on the trunnion, centerpunch, and drill. Works great for me doing that.

    Nice lookin jigs btw!

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    GuncoHolic zteknik's Avatar
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    I just recieved mine and its realy nice.
    I did notice your going to have to trim up the top rails-their a tad to wide.
    I have a photocopy of an akbuilder flat that I plan on using as a template-it should work just like the old coldsteel ones.

    It should work if your slightly off on your drilling.The AK platform has looser tolerances to make mass production by many countries easier so I dont think it would be an issue.

    I also use the tape method as well in a pinch if I cant find my callipers-actualy I think its a bit easier somtimes,my shop is a mess!
    Keep the change-I just want my Country back!!!

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    No Hope For Me Coils's Avatar
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    Yeah, don't use a template, use masking tape or a post-it note.
    "Government is not the solution to our problem, government is the problem" Ronald Reagan

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    NoWorkCamp4Me railbuggy's Avatar
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    Spent five hours today working on my Polish receiver.Have all holes drilled and did a quick cold blue for rust protection.I glued a AKBuilder template to the blank and double checked everything with my unused NDS-1,and a Romy front and rear trunnions. I have a small 90 amp stick welder that I plan to rigg for spot welding the rails .Not bad for a guy running with one headlight.
    Pictures were taken with a Nikon D200 that is to much camera for me.
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    SOON-We already lost the war. You are the resistance.

  7. #7
    Gunco Good ole boy tanvil's Avatar
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    Nice work on the receiver and the jigs RB. If ya want to borrow a trigger housing jig, it's only a mailing envelope away.

  8. #8
    NoWorkCamp4Me railbuggy's Avatar
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    I could use some kind of trigger rivet jig.The sidefolder I put together last week,I used screws on the trigger guard. I found this jig while looking for info on (lower bolt rail installation) -Socandyman's $5.00 Trigger Guard Rivet Jig- .Does anyone have a link to a good lower bolt rail installatin video?Socandyman's $5.00 Trigger Guard Rivet Jig I was thinking on fabracating something like the Socandymans jig.It may be cheaper than round trip shipping to Marylands Chesapeake bay area .
    I just payed $10.70 shipping to get eight like new (chinese flat back spineless mags I like)from AIM surplus who's about 60 miles north of me.Got to watch your pennys when your only income is a disability check. I did take Coils advise and used the masking tape method for drilling the trunnion holes.Life is good.Its great to be here with friends at GUNCO. Peanut butter jelly time.I'll be back.
    SOON-We already lost the war. You are the resistance.

  9. #9
    Gunco Good ole boy kernelkrink's Avatar
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    Do you have a vise with removeable jaws? Clamp the TG in the jaws and use them for the steel in the Socandyman's jig post. Clamp TG in the vise, set the receiver on top, then smash the rivets with a punch and hammer. When done, flip the jaws over and the dimples stay protected and out of sight for the next build. Cost = $0. I use a punch with the side ground out to clear the rails.

    Lower rails are easy, use the front trunnion as a guide. You want each rail's top side at the same level as the slots where the bolt locking lugs slide into the trunnion. Use a drill bit placed between the upper and lower rails as a spacer, 1/4" is a good starting point but you will probably need to go up or down to fit your particular gun. Also not uncommon for you to need a different spacing on each rail. Once you have them spaced, slide them toward the trunnion, they can touch or I like to leave just a hair widths gap between them to ensure the recoil against the trunnion is not pressing against the rails and trying to pop the welds. Clamp in place and spot weld in, use the weld pattern on your NODAK receiver as a guide.

  10. #10
    NoWorkCamp4Me railbuggy's Avatar
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    Much Thanks kernelkrink.I,ll get on it.
    SOON-We already lost the war. You are the resistance.

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