I bought some additional 20 round magazines for my FN 57. The dealer I bought them from said he had some 10-round extensions available. Since the extensions were made by FN I thought I�d give them a try.
I have 120 rounds through the 3 magazines with the extensions installed with no issues whatsoever. (I reloaded and shot 30 out of one magazine twice.
I fired them up at the local machine gun shoot. Mostly I killed pumpkins with triple taps.
The magazine takes the first 27 or 28 rounds OK but the last two or three are difficult to load.
