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AR10 Compatibility

Discussion in 'Rifle Country' started by berettaprofessor, Aug 12, 2017.

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  1. berettaprofessor

    berettaprofessor Member

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    Can anyone sort out AR10 compatibility for me? Am I correct in thinking that DPMS and LR (LaRue) are completely compatible? What about something called SR25 or M110?

    Building an AR10 with a Stag Lower and Upper, which are supposed to be compatible with DPMS style parts. Trying to find all my options.
     
  2. Robert

    Robert Administrator Staff Member

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    There are two major camps when it comes to compatibility, DPMS and Armalite. Some of the other boutique companies do their own thing with some crossover but as long as you stick with one of the big two you will be fine. The DPMS pattern has more following as far as parts for builds and aftermarket accessories but Armalite is not that far behind.
     
  3. berettaprofessor

    berettaprofessor Member

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    Yes, but not all accessories are labeled "DPMS". What other things are compatible besides LR?
     
  4. navajo

    navajo Member

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    Hammer, trigger, springs for both and buffer tube are the same for all as far as I know. Retaining pins for trigger and hammer also.
    All 6 of the AR 10s i have owned were Armalite, can't comment on the others.
    But... get upper and lower from the same maker. Read too many stories about folks that mixed but didn't match 100%.
     
  5. 12Bravo20

    12Bravo20 Member

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    Unfortunately there is not any standard when it comes to 308/large frame AR rifles. Even among those that are built to the DPMS standard.

    Your best bet is to stick with a lower and upper receiver from the same manufacturer. Palmetto State Armory, Aero Precision, DPMS, among others. I would also source your parts kit from the same manufacturer as your receivers.

    I went with all Palmetto State Armory parts to insure every thing would work together. Even though the PSA PA10 is a DPMS pattern, it is not completely compatible. Some parts will not work.
     
    Hokie_PhD likes this.
  6. berettaprofessor

    berettaprofessor Member

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    So, it's buyer beware? I'll go with upper, lower, and BCG from the same company (Stag in my place), but I'm wondering about the rails and other accouterments.
     
  7. navajo

    navajo Member

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    Barrel nuts are different on some. I don't use rails, no idea on those.
     
  8. Klint Beastwood

    Klint Beastwood member

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    There are a lot of clones... the real m110 is made my knights armament...ive never see a real one for commercial use. the mk11/ SR25 is knights too. The clones are usually DPMS...BUT ALWAYS verify.
    Most companies will say DPMS compatible or armalite compatible.
     
  9. kcofohio
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    kcofohio Contributing Member

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    I have been wondering that myself. Thanks for asking.

    Most of the search I did turned up a lot of talk dating around 2011, give or take. Had to wonder if much has changed in the last few years.
     
    Hokie_PhD likes this.
  10. bfoosh006

    bfoosh006 Member

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