BM59/62 were in 7.62 Nato. MAS-49 is 7.5 French. New BARs take a different magazine than the original, unless you're talking about the new semi-auto version of the military BAR. But those are around $2k. Cobb manufacturing makes a fine rifle that takes original BAR magazines http://www.cobb50.com/mcr.htm About the only one you can find for less than $1k is the FN-49 in 30-06. Scarce, usually beat up, but fun. Most FN-49s are in 8mm or 7.7(?).