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Old February 09, 2019, 23:39   #1
Randall
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A Standard for the AR10?

Has the industry settled on a build standard for the AR-10 yet? I keep reading things like this mag wont work with that AR-10 or that part wont work with that rifle. Are most parts interchangeable these days?

If not a standard then who is the most prolific manufacturer of AR-10's and parts. Inquiring minds want to know.

Thanks in advance.
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Old February 09, 2019, 23:42   #2
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Originally Posted by Randall View Post
Has the industry settled on a build standard for the AR-10 yet? I keep reading things like this mag wont work with that AR-10 or that part wont work with that rifle. Are most parts interchangeable these days?

If not a standard then who is the most prolific manufacturer of AR-10's and parts. Inquiring minds want to know.

Thanks in advance.
I think the DPMS pattern seems to be the standard.
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Old February 10, 2019, 10:14   #3
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I think the DPMS pattern seems to be the standard.
Yep. The DPMS-pattern is the de facto standard by a wide margin these days.
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Old February 10, 2019, 21:36   #4
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But then again, not all DPMS parts are 100% compatible....
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Old February 10, 2019, 21:40   #5
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But then again, not all DPMS parts are 100% compatible....
Now, you got me confused. Are you saying that not all DPMS AR-10 parts are compatible with other DPMS AR-10 rifles? or other companies rifles?
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Old February 10, 2019, 22:17   #6
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They have "tall" and "short" picatinny rails which allows different mounting heights of optics. Look at this link.

https://www.midwestindustriesinc.com/category-s/312.htm

Make sure your upper receiver and handgun rd have same height rail though seen people do odd things to get a rifle to the range. Also they now have their DPMS Gen 2 AR 10's which can really mess a fellows kit up if order a mix of Gen 1 and Gen 2 parts but would almost have to try considering how well they market Gen 2 as improved.

I use all DPMS and just make sure to check my charts and read the vendor parts descriptions and have yet to get any incompatible parts. DPMS Gen 1 is pretty much the current AR 10 standard used by most. It's most common when grab off shelf and run on a Saturday five minutes before parts shop closes and need to finish a build for after church on Sunday.

https://monstrumtactical.com/blogs/g...-and-an-lr-308

I mostly use DPMS Lo Pro parts but that's just me. This thread will likely turn into a disertation eventually but I don't have time to start off the wall of text on this one.
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Old February 10, 2019, 22:20   #7
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DPMS "pattern" vs Armalite "pattern". However, on occasion you'll find some DPMS pattern parts may or may not fit, depending on how proprietary certain makers are, as there is no real 'mil-spec' for the AR-308 type rifle, as there is with the AR-15. As always, ymmv...
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Old February 10, 2019, 22:24   #8
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If the u.s. mil had standardized; put into general issue, an AR type 7.62 NATO, I think we would have a standard pattern.

But alas, that never happened.

The lack of a common mag really is a huge pain.
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Old February 11, 2019, 14:21   #9
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Now, you got me confused. Are you saying that not all DPMS AR-10 parts are compatible with other DPMS AR-10 rifles? or other companies rifles?
I hope this helps un-confuse you a little. My PSA GEN 2 Upper WILL NOT FIT on a CMMG Lower or an Aero Precision Lower. WILL NOT FIT. The PSA Upper ONLY FITS on a PSA Lower. I tried it on FIVE PSA lowers and it fit every one of them with no problem.

HTH,


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Old February 11, 2019, 14:31   #10
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I don't have time to start off the wall of text on this one.


Huey!

Are you not well?... Should we send for the doc?
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Old February 11, 2019, 15:05   #11
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What is the difference between Gen 1 and Gen 2?

Also, isn't there yet a 3rd type: the original AR10 which is not an upsized AR15 like the other two??

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I hope this helps un-confuse you a little. My PSA GEN 2 Upper WILL NOT FIT on a CMMG Lower or an Aero Precision Lower. WILL NOT FIT. The PSA Upper ONLY FITS on a PSA Lower. I tried it on FIVE PSA lowers and it fit every one of them with no problem.
When you say it does not fit do you mean something minor or a gunplumber-cursing-DSA-kinda of issue?
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Old February 11, 2019, 15:17   #12
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When you say it does not fit do you mean something minor or a gunplumber-cursing-DSA-kinda of issue?
Coffee... meet monitor.

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Old February 11, 2019, 15:18   #13
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I hope this helps un-confuse you a little. My PSA GEN 2 Upper WILL NOT FIT on a CMMG Lower or an Aero Precision Lower. WILL NOT FIT. The PSA Upper ONLY FITS on a PSA Lower. I tried it on FIVE PSA lowers and it fit every one of them with no problem.

HTH,


Jarhead
Thank you brother.
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Old February 11, 2019, 16:08   #14
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It's pretty well known that PSA upper receivers only fit PSA lower receivers. They are not made to DPMS specs and are not purported to be.
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Old February 12, 2019, 07:31   #15
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Huey!
Are you not well?... Should we send for the doc?
Wife's bone disease bit her in a MVA and spent a week in Level 2 Trauma Ward. They released her to 24/7 home health care (me) for the next two weeks before reevaluate. I don't have time for much of anything but trying to keep her out of an assisted living facility right now.
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Old February 12, 2019, 07:57   #16
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Wife's bone disease bit her in a MVA and spent a week in Level 2 Trauma Ward. They released her to 24/7 home health care (me) for the next two weeks before reevaluate. I don't have time for much of anything but trying to keep her out of an assisted living facility right now.
Dang Huey! I was reading this thread and didn't expect to see anything like this here. I have said a short prayer for you, your wife, and her docs. May you have His peace upon you and her be healed. Amen.
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Old February 12, 2019, 08:07   #17
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Well said GG.

Peace, blessings and mercy be your aide Huey
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Old February 12, 2019, 12:48   #18
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Good thoughts headed your way sir. Good luck Huey!
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Old February 12, 2019, 14:59   #19
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We are at doctors in Atlanta but she was run off road by oncoming car texting while driving hitting a brick mailbox (illegal to build on DOT or Postmaster Approved structure on state highway right of way) which threw her into flat spin cutting utility pole in half then culvert that started truck into a roll. Was only going 45 mph but shoulders of road were iced over which didn't help.
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Old February 13, 2019, 06:26   #20
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Prayers sent Huey
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Old February 13, 2019, 06:41   #21
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Godspeed to you and Mrs. hueyville.
May the blessings be.
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Old February 17, 2019, 13:23   #22
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I have a couple of PSA uppers, and wondering if I can get them to fit DPMS pattern lowers. Seems bore axis is too low. Can I mill the bottom of the carrier? Seems to function fine until I insert mag. Is mag too high?
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Old February 17, 2019, 17:56   #23
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First, thoughts and prayers out to Huey and his family.

Quote:
Originally Posted by bob_e95482 View Post
I have a couple of PSA uppers, and wondering if I can get them to fit DPMS pattern lowers. Seems bore axis is too low. Can I mill the bottom of the carrier? Seems to function fine until I insert mag. Is mag too high?
if the bore axis of the upper is to low, the hole for the receiver extension (aka buffer tube) is too high. No fix for that with some major machining, over sized pins and other surgery.

Short story on AR 308s - buy uppers and lowers from the same source.
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Old February 17, 2019, 19:20   #24
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May God be with you Huey, and may your woman make a speedy recovery.

I do so look forward to your essays.
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Old February 24, 2019, 10:36   #25
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If the u.s. mil had standardized; put into general issue, an AR type 7.62 NATO, I think we would have a standard pattern.

But alas, that never happened.

The lack of a common mag really is a huge pain.
Excuse me KAC SR25, MK11, M110, M110K1 have been in US service for a long time. And a pet peeve is calling it a "DPMS magazine", you are talking about a copy of the SR25 magazine not a magazine developed by DPMS.
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Old February 24, 2019, 11:53   #26
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I have few DPMS branded mags, that came in DPMS packaging, that simply will not feed in a DPMS.

Premium mags, like Pmag and Lehigh work well.
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Old February 24, 2019, 12:12   #27
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Excuse me KAC SR25, MK11, M110, M110K1 have been in US service for a long time. And a pet peeve is calling it a "DPMS magazine", you are talking about a copy of the SR25 magazine not a magazine developed by DPMS.
They, however, are manufactured, and supported by a sole source logistics contact. So, the government has no influence, nor does the contractor have the desire, to force standardization on other manufactures.

Then there is also the scale of the USG purchase, it's tiny comparitively. Prior to the M110, for nearly 30 years the Remington 700 was the basis for sniper rifles in both the Army and Marine Corps, yet all Mauser influenced bolt actions did not shift to the Remington 700 design.
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