receiver flex
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Thread: receiver flex

  1. #1
    Gunco Regular smartbomb's Avatar
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    Default receiver flex

    biggun, hc and the rest of you seasoned builders

    one of the issues with ak precision is too much flex on the stamped receivers, right? is it possible to weld stiffening plates to the receiver or bend thicker (>2mm) flats to minimize the flex?

    curiosity is getting the best of me. the wife has agreed to get me a psl kit for christmas. my option is to get a nodak receiver or try something stiffer. the plan is to ditch the x54 barrel and go the biggun route and try something outside the norm. i like the 6.5 swede, or if the kit will handle it a 7mm-08. this and the x25 parts i have should get me thru the florida winter.
    al gore is full of carbon enriched shit

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    TRX
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    I guess a fair comparison would be an ordinary AKM vs. a Yugo.

    My best guess is that receiver flex isn't hurting much, since it's consistent.

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    No Hope For Me 1biggun's Avatar
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    Last edited by 1biggun; 05-21-2016 at 08:37 PM.

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    BANNED nalioth's Avatar
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    The receiver's got nothing to do with accuracy.

    Any "flex" that shows up, does so long after the bullet has left the barrel.


    The sights are mounted on the barrel (fore and aft), so you can't pin any sighting issues on it, either.

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    No Hope For Me 1biggun's Avatar
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    Last edited by 1biggun; 05-21-2016 at 08:37 PM.

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    Gunco Regular smartbomb's Avatar
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    see this is why i ask the questions. i do not know these things i am starting the learning curve. rumor has it that flex is the achilles heel of the ak platform (look at the comments on any ar discussion board).


    as far as chamber pressure and bolt thrust are concerned, i used the web app i wrote to compare. based on the info i could get of the www,

    the x54 has a cham press of 57000 and a thrust of 10617 psi
    the 7mm-08 has a cham press of 61000 and a thrust of 10583 psi
    the 6.5 swede has a cham press of 55000 and a thrust of 9047 psi

    all 3 are very close and most likely well within the tolerance of the bolt and chamber. i assumed the x54 psl kit would be a better starting point for a large caliber/long range rifle.
    al gore is full of carbon enriched shit

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    No Hope For Me Coils's Avatar
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    rumor has it that flex is the achilles heel of the ak platform (look at the comments on any ar discussion board).
    First mistake, listening to AR people talk about something other then ARs

    Most AKs are fairly accurate, and a lot of them are more accurate then people think. A couple of the main things I noticed that can cause problems; 1-Ammo, most people shot surplus or low quality ammo. 2-The trigger can make a big difference, a gritty or hard trigger (plus the long travel) can cause people to move around before the shot is fired. 3-The shooter, yes the person holding the firearm can be the cause as well.



    i assumed the x54 psl kit would be a better starting point for a large caliber/long range rifle.
    Your assuming right, at least that's my opinion too.
    "Government is not the solution to our problem, government is the problem" Ronald Reagan

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    GuncoHolic Rahatlakhoom's Avatar
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    Here's a slow motion clip of the AK.
    I can see barrel flexing going on.
    The large bolt also racks the entire rifle.

    Charter member-Busted Box Club est. 2006

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    No Hope For Me 1biggun's Avatar
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    Last edited by 1biggun; 05-21-2016 at 08:38 PM.

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    Gunco Regular smartbomb's Avatar
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    Quote Originally Posted by Coils View Post

    Most AKs are fairly accurate, and a lot of them are more accurate then people think.
    coils i agree. i have a norinco hunter (milled) that is phenomenal. i can bust tennis balls all day long on the iron sights. once i got the saiga 308 dialed in it shoots 11/2'-2" groups, even with a few stringers i am still center mass. i could care less about tack driving, my eyes arent that good. i just want the round to go where i point it within the limits of the system.
    al gore is full of carbon enriched shit

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