laurencen Posted September 14, 2021 Report Share Posted September 14, 2021 just been asked a question, will a upper from a 1928A1 fit the M1a1 lower and a M1a1 upper fit a 1928A1 lower I seem to recall one way they do the other they do not, thanks Link to comment Share on other sites More sharing options...
BillyDixon Posted September 14, 2021 Report Share Posted September 14, 2021 total interchange, just slide on -off , cosmetic differences and cant use drum on the m1, just sayn Link to comment Share on other sites More sharing options...
Got Uzi Posted September 15, 2021 Report Share Posted September 15, 2021 The back end of the receiver/lower are a different profile. Link to comment Share on other sites More sharing options...
Grasshopper Posted September 15, 2021 Report Share Posted September 15, 2021 Yep, I shoot my M1 with a '28 lower. Allows me to take the stock off easily for transportation. Grasshopper 1 Link to comment Share on other sites More sharing options...
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