AR caliber change

Discussion in 'AR-15 Discussion' started by dragunovsks, Nov 9, 2008.

  1. dragunovsks

    dragunovsks New Member

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    Is it possible to change the caliber of an AR simply by switching out uppers and mags? I was watching Future Weapons today and they were talking about the .50 BEOWOLF round. Mac switched out his 5.56mm upper with one chambered in .50 Beowolf to take care of a hostile vehicle. Is this possible on a commercial AR or was his "special"?
     
  2. junho806

    junho806 New Member

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    i think it depends
    like if you want to convert it to a 7.62 you need a special lower and upper and barrel
    not sure about the .50 bewolf but i'm gonna guess most likely
     

  3. Txhillbilly

    Txhillbilly Well-Known Member

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    Yeah,Remove the mag,make sure chamber is empty,push out lower pins, remove upper. Install new upper,push in lower pins,install mag,chamber round,and fire your other caliber upper.
     
  4. Dillinger

    Dillinger New Member

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    Pretty much spot on as the info above will tell you. If the round takes a long mag ( like the 7.62 ) then you can't. However, I believe that the .50 Beowulf is in length with the smaller, standard, AR-15 size mag slot in the lower receiver.

    As such, an upper chambered for .50 Beowulf, two pins and a mag change later, you are good to go.

    One of the truly great things about the AR platform :)
     
  5. matt g

    matt g New Member Supporter

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    If you change from 5.56/.223, you're going to need a new bolt.
     
  6. Dillinger

    Dillinger New Member

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    My 6.5 Grendel uses the same bolt, the bolt head ( 7.62 x 39 ) is all I needed to change to chamber the smaller case.
     
  7. matt g

    matt g New Member Supporter

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    I'm talking about the bolt itself, not the carrier. I'm working off GI terms here, I apologize if the civilian equivalents are different.
     
  8. dragunovsks

    dragunovsks New Member

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    Well thanx for the info, however on Future Weapons, Mac just switched out uppers. He had a complete .50 Beowolf upper and mag in a bag in the backseat of the SUV. He simply switched out the upper and mag and was ready to rock and roll. I was told by the guy at the store where I bought my AR that I might as well buy a second AR in a different caliber. He said that they couldn't be switched out like that. However he did say that I could go from a standard military A2 configuration to a flat-top with a varmint barrel in the same caliber (which I kinda figured anyway). Maybe he was trying to sell my another AR?
     
  9. jeepcreep927

    jeepcreep927 New Member

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    50 Beowulf upper functions on a standard AR 5.56/.223 lower. The bolt face is larger however so you could have a complete upper (with proper bolt, carrier which is the same as 5.56/ .223, charging handle etc.) and slap it on, then use the appropriate magazine.
     
  10. Dillinger

    Dillinger New Member

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    You ought to go back and punch him in the mouth for lying to your face. :p

    Look, the AR lower is an AR lower for whatever upper you put on there, provided that the mag well will handle the new magazine. That's it. There isn't a magic component from one lower to the next.

    Yes, you can buy a complete new upper in say, .50 Beowulf, and include a new Bolt Carrier Group and charging handle, the whole nine yards. You would pull two pins and be good to go.

    However, you could also just buy a new bolt head, and with about 2 or 3 minutes of work and a little oil, you don't need to spend the money on a whole new BCG.

    However, you still need a new barreled upper in the correct caliber. :)
     
  11. dragunovsks

    dragunovsks New Member

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    Cool, I'm not sure what caliber upper I want yet or even if I really need one right now but I was just wondering for later reference, Thanx.
     
  12. DuckA

    DuckA New Member

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    The .458 SOCOM is another round that you can fire in an AR by only switching the complete upper. It even uses the standard mags. The only difference is that a 30 round mag only holds roughly 10 or so .458's. The article that I read the other day said that the .458 is a lot easier to get rounds for than the .50 Beowulf.
     
  13. dragunovsks

    dragunovsks New Member

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    I've heard a little about the .458 Socom, I've heard it has a lot of power. How much would an upper chambered in this round run me?
     
  14. dragunovsks

    dragunovsks New Member

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    I've heard a little about the .458 Socom, I've heard it has a lot of power. How much would an upper chambered in this round run me?