AR15 & AR10 comparability
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Old 07-16-2012, 03:00 AM   #1
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Default AR15 & AR10 comparability

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?

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Old 07-16-2012, 03:06 AM   #2
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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.

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Old 07-16-2012, 03:10 AM   #3
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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

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Old 07-16-2012, 03:11 AM   #4
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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.

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Old 07-16-2012, 03:12 AM   #5
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Quote:
Originally Posted by 00possum View Post
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?
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.
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Old 07-16-2012, 03:31 AM   #6
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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???

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Old 07-16-2012, 03:35 AM   #7
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Quote:
Originally Posted by 00possum
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???
Rock river arms has uppers for .243 win and 7mm-08.
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Old 07-16-2012, 03:36 AM   #8
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Quote:
Originally Posted by 00possum
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???
What are you looking to hunt for? A 75gr 223 will do wonders on woodchucks and cyotes
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Old 07-16-2012, 03:51 AM   #9
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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

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Old 07-16-2012, 04:09 AM   #10
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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.

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