Rparrish Posted April 20, 2020 Report Share Posted April 20, 2020 Hello, just curious if there are any options for using any other manufacturer's A4 style flat top upper receiver on a B series AR-10. I would prefer to use an Armalite upper receiver, but it's rather difficult finding one at this point. Any help would be greatly appreciated. Quote Link to comment Share on other sites More sharing options...
jtallen83 Posted April 20, 2020 Report Share Posted April 20, 2020 NOT Matrix, they have a similar looking cut at the rear but the two I have, one with DPMS barrel nut threads and one with Armalite barrel nut threads, will not interchange with my B model Armalite. I am not aware of any currently on the market that will swap. Quote Link to comment Share on other sites More sharing options...
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