FN 49 is correct, do you know what caliber that one is?
I believe they were made in 8mm, 7mm and .308
Yep, Argentine where upgraded by FN to 20 detachables, while all others where 10 round semi fixed. There was even an option to upgrade these to full auto (AFN49) but with only a 10 round mag it was a silly option.It appears to be missing the magazine by the way. The 7.62 NATO Argentine ones had a detachable mag, the rest were somewhat fixed.