AR15 & AR10 comparability

Discussion in 'AR-15 Discussion' started by 00possum, Jul 15, 2012.

  1. 00possum

    00possum New Member

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    Ok, ill start off by saying sorry for my ignorance. What is computable between the two? I would like to buy only one lower and be able to shoot 308 and 223. I heard a AR10 upper can't go on a AR15 lower, then again I heard it could. I have bought a mil spec and commercial ar-15 buttstock and would prefer to use those. So could someone help me through this?
     
  2. jjfuller1

    jjfuller1 New Member

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    Swap Any ar15 for ar15 upper and lower. but dont Swap any AR 10 upper and lower. you can't mix em. The ar10 platform is dementionally larger than ar15s. Same concept just bigger. This means you will have to buy 2 lowers and 2 uppers not 1.
     
    Last edited: Jul 15, 2012

  3. JonM

    JonM Moderator

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    Normally they arent even compatable with each other from different makers.

    However there is a new dog in town... the colt le901. Its a 308 ar10 type that through clever use of double front take down pins in an adapter block will allow the use of any milspec 556/223 upper on the le901 lower.

    Everything else is not compatable
     
  4. Gatoragn

    Gatoragn Active Member

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    AR 10 shoots a 7.62 mm x 51 mm cartridge.

    AR 15 shoots a 5.56 mm x 45 mm cartridge.

    The mag well on the 10 is 6 mm longer than the 15. Could be some difference in width also.

    I don't believe there is a mil. spec. for the AR10, so you can't readily mix and match brands.

    Any mil spec AR15 upper should run on any mil spec AR15 lower.
     
  5. Jpyle

    Jpyle New Member

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    AR15 and AR10 differ substantially due to case length. An AR15 cannot handle the longer cases used for .308 (51MM) rounds. Another difference is availability of parts...an AR15 pattern parts set is the same regardless of maunfacturer since it adheres to a military specification...mil-spec. All AR15 mil-spec parts are interchangeable. No such standardization exists for the AR10...DPMS and Armalite patterns are the most common but are not interchangeable. Receivers, barrels, LPK and certain other parts need to be of the specific pattern.
     
  6. 00possum

    00possum New Member

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    Then what is the biggest hunting caliber for AR15 that is common? Is there a 308 upper? I don't want anything like 7.62x39 or anything that could be confusing. Something like 223,204,22-250,308,30-30,25-06. In fact what other calibers are there for the AR15???
     
  7. jjfuller1

    jjfuller1 New Member

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    Rock river arms has uppers for .243 win and 7mm-08.
     
    Last edited: Jul 16, 2012
  8. jjfuller1

    jjfuller1 New Member

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    What are you looking to hunt for? A 75gr 223 will do wonders on woodchucks and cyotes
     
  9. purehavoc

    purehavoc New Member

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    6.5 grendal is a hot one for long distance hunting. .243 would be another good one. Both of which will fit the ar15 lower
     
    Last edited: Jul 16, 2012
  10. 00possum

    00possum New Member

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    I want a gun I can use for everything from foxes, to deer or a big boar. I dont want to worry to much on shot placement either.
     
  11. JonM

    JonM Moderator

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    Shot placement is always a factor regardless of caliber. Doesnt matter if its a rubber band gun or naval guns. Just ask the 2 or 3 survivors of the hms hood what they think of shot placement...

    Anyway the only ar out there you can use 308win and 556 on the same lower is the colt le901
     
  12. Sniper03

    Sniper03 Supporting Member Supporter

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    OOPOSSOM,

    Jon and the guys are correct regarding the 7.62X51 or 308 ARs are totally different than the 5.56/223 ARs. Everything is larger. Receivers, Bolts, Magazine Well and all.
    And I think JJ just made a type O. Rock River offers the LAR 8 in 308, 243 and 7mm-08 not 7mm Mag.
    I have their AR-15 Rifles and also a Rock River LAR-8 Mid-Length A-4 in 16 inch. It is a shooter. In fact I used it on an Outdoor Channel Show to shoot an 8 Point Buck with Hornady 150 Gr. 308 and it worked great. It was a 100 yard shot. And dropped the Deer. DRT!
    Good luck on your selection. But most all the 308s are fine rifles. Haven't heard anything negative about them no matter what name brand rifle they have been. I like the Rock River especially for the 2 Stage NM Trigger and the non proprietary magazine. Since they use FN-LAR Inch or Metric mags that can be purchased at most any gun show at a reasonable price. My good friend has a DPMS and he likes it while another has an Armalite.

    03
     
  13. treehugger49

    treehugger49 New Member

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    On the AR-15 platform, the 6.8 SPC is an excellent round for deer and hogs at mid-range distances, out to about 350 yards.
     
  14. treehugger49

    treehugger49 New Member

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    I don't think there is any round that will turn a bad shot into a good one.....
     
  15. jjfuller1

    jjfuller1 New Member

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    not even a .50 bmg or 125mm?? lol just razzin ya.
     
  16. treehugger49

    treehugger49 New Member

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    OK....I'll rephrase.

    I don't think there is any round that I can afford that will turn a bad shot into a good one!:)
     
  17. buffalolake

    buffalolake New Member

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    I have two uppers for my AR-15. A 223 Wylde and a .50 ccal Beowulf. I personally have put a 3/4" hole in an old steel car rim with the Beowulf, and the manufacturer claims that one of the 400 grain rounds can pass through 34" of balistics gel at fifty yards. It is a fun cartidge to shoot, and I would feel confident that I could take on anything native to North America with it. The only downfall is ammunition supply, it can be tough to find in stock. I going to start reloading mine.
    [​IMG]
    This is 3 5.56 holes and 2 .50 cal Beowulf holes
    [​IMG]