I recently purchased a AR10 upper from PSA to put on my Aero M5 lower. I had no idea there were variants of AR10. Does PSA make an AR10 upper with DPMS high profile?
No. PSA’s profile is proprietary. PSA AR10 lowers only match with PSA AR10 uppers.
Unlike AR15s, there is no universal standard of dimensions (milspec) for AR10s.
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To add to what @SuperPredator said, dpms low rails will be a better fit than dpma high.
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Is this true for lead stars dmr uppers?