https://m.youtube.com/watch?v=4tYofOektTg
in the description it says the R RPR will use 10/22 magazines.
Accepts all 10/22® magazines.Also includes: one, 15-round BX-15® magazine. Model 8401 ships with two, 10-round BX-1 magazines.
Interesting... I wonder if the BX - prohibited will fit or if the are the same design.