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Thread: Ar15 shorties in 5.45x39 .... said what ?

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    Chinese Connection Bluejack's Avatar
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    Default Ar15 shorties in 5.45x39 .... said what ?

    okey , I got one barrel make just for my carzy idea . I had it made me a shorties 7.5 inch AR15 barrel in 5.45x39 . yes I did....
    now here is questions, what part do I need to finish the front end lol( not much of AR guy ) what size of gas rod . block , front sight base, handguard. flash hider . any idea are welcome



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    Gunco Veteran Bolt2bounce's Avatar
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    BJack I'd measure the barrel at the gas port and see what OD for the gas block is, you may need a adjustable gas block..JP enterprises makes a good one, I'd use a Stainless steel one.. to buck the heat..you may need a cork screw gas tube for better cycling..dwell time, sounds like a cool project.. I'd use a Hydrolic buffer for it also..so are you going to build a pistol or SBR. B2B

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    Chinese Connection Bluejack's Avatar
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    I already had SBR lower , yes I want be sure did not buy the stuff I don't need, thank the info B2B


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    Gunco Addicted for life j427x's Avatar
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    1 barrel nut , or one free float set up for pistol or CAR. free float quad rails come with their own barrel nut--

    1 pistol length gas tube and pin

    1 gas block --probably .750 if you go with a low profile gas block you can use a CAR free float quad rail and just have the muzzle end stick out the rails--

    take a look over at JSE--they build all kinds of pistol and 7' SBR type uppers. you can sort of pick out how you want to finish that 5.45 barrel.


    JSE Surplus

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    Citizen, Patriot, Ranger bellson's Avatar
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    Quote Originally Posted by Bluejack View Post
    okey , I got one barrel make just for my carzy idea . I had it made me a shorties 7.5 inch AR15 barrel in 5.45x39 . yes I did....
    now here is questions, what part do I need to finish the front end lol( not much of AR guy ) what size of gas rod . block , front sight base, handguard. flash hider . any idea are welcome



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    Looks like a .750 at the gas port, and .950 between the gas port and the breech end. Take a micrometer to it. That is the best way to know.
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    Gunco Addicted for life j427x's Avatar
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    we forgot some important things --

    like a upper, forward assist, and port cover kit--LOL

    and if you don't have one all
    ready a blot carrier and bolt for 5.45 and a charging handle.

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    Chinese Connection Bluejack's Avatar
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    lol, no I did not forget , I already had few 5.45 blot / carrier, upper complete. charging handle lay around for this build


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    Gunco Addicted for life j427x's Avatar
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    Talking

    for a really short barrel i like something like this ---

    it has the more common CAR rail with free float it does require a low profile gas block.
    Attached Images Attached Images

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    Chinese Connection Bluejack's Avatar
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    now that is how I like it


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    Gunco Regular pupwag's Avatar
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    It's only metal, it's not magic.

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