20" barrel

Discussion in 'AR-15 Discussion' started by SkilletFan24, Feb 7, 2014.

  1. SkilletFan24

    SkilletFan24 New Member

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    Hey y'all I'm looking to build a 2nd upper for my AR. I wasn't this to be a 20" barrel since my other upper is a carbine length. Do any of you guys know of a decent barrel that won't break the bank? I'm not looking for all the bells and whistles, I just want something that doesn't suck and is affordable. Thanks!
     
  2. JonM

    JonM Moderator

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    Any particular reason why 20"??

    My pref is 16"midlength.

    20's are more for varmint or precision builds. There are a few companies that have govt profiled 20" none of which I would particularly want in a serious gun.

    I've got a couple 20's one is my rra national match full heavy barrel from wilson arms, another is a bull barrel from krieger, and I have two older m16 pencil barrels I bought years ago as surplus for plinking.
     

  3. SkilletFan24

    SkilletFan24 New Member

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    I was wanting to build a precision AR upper. Would 18" be better? Trying to weigh the pros and cons of different length barrels. But I don't want another 16" barrel unless it's a colt.
     
  4. Mercator

    Mercator New Member

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    For precision in repeat shots, the barrel weight will help more than the length.
     
  5. JonM

    JonM Moderator

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    if your looking to build a precision ar15 good barrels arent cheap. whats your price range??

    20" will be heavy 18 a little less so but finding a good 18 isnt easy. 20" will be a smoother shooting gun with a rifle length gas system. 20 will get you out to 600yds very easily under any conditions. 600yds is the realistic range of a 223/556 just due simply to bullet weight to case capacity ratio.

    20 inch will go a bit past 600 yards before it poops out but wind is going to blow that little itty bitty bullet all over the place making longer shots under less than ideal conditions problematic. that is why you really dont see a lot of 20" rifles anymore in 223/556. other rounds do it waaaay better

    223/556 is really an under 600yd cartridge. i would personally put in the 300yard max category as it pretty much turns into a 22mag-22lr much past 300yds. anyway... good barrels come from whiteoak, shilen, krieger, fn, wilson arms (not combat), and a few others i cant remember atm.
     
  6. Triumphman

    Triumphman Active Member

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    Take a look at Green Mountain. They offer a few assortments that might work. 2" on a Barrel won't make a difference in velocity or accuracy. The Accuracy will come from how rigid the Barrel is from the forces of flex. This is where Bull compared to Pencil Barrels differ in their Accuracy performance and not their lengths. Only hold back is if wanting in Stainless or Barrel Steels. I've only seen Bulls in Stainless which won't come with any Bore Treatments.
    Other Barrel Makers for AR's: Shaw, Krieger, FN, Douglas, Hart, Shilen, Obermeyer, Rock, Criterion, White Oak, Lother Walther, Schneider, Lilja, McGowen, Montana just to name a few.
     
  7. string1946

    string1946 New Member

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    I don't have it yet but have a 20" SS bull barrel on order from Black Hole Weaponry. Have read good things about their barrels. $342 delivered.

    Sent from my SCH-I925 using Firearms Talk mobile app
     
  8. sweeper22

    sweeper22 New Member

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    My ideal precision setup is an 18" SS barrel with a 1:8 twist. Those are easy to find, but most are quite expensive. I just believe that's the length and twist that offers the most beneficial performance with no real detractive attributes.

    A few months back I built a 20" SS precision AR...Noveske lower, ambi CH, M16 BCG, CTR stock, 15" MI handguard, Magpul F/R MBUS...got the whole thing built for just over $1K. This is the upper I used. It's out of stock right now, but it'll be back. Maybe tomorrow, maybe in three weeks. The price was under $500. The barrel and handguard were both excellent, but this will be a heavy rifle.

    So you can build the rifle for $1000. But then you may desire a heavier stock to balance it out a bit. And a $200 trigger. And optics. Maybe even a bipod. And your budget has suddenly spun out of control, LOL.
     
    Last edited: Feb 8, 2014
  9. X-mark

    X-mark New Member

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  10. SkilletFan24

    SkilletFan24 New Member

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    Gosh that's more expensive than I thought it would be lol. If I went with another 16" barrel, what would be a good company and twist rate? Also I would want to free float it so what's a good length for the free float handguard?

    One more thing. What's the best twist rate for a 55 grain, 62 grain, and 70-something grain bullets?