I had a 10 shot for my Brno. It truely, absolutely stank and was an unreliable PoS. I have used the Interarms (Norinco) 5-shot mags. Generally less than $14. They need a tiny bit of touchup with a file to snap in and drop free, but are WAY cheaper that the genuine CZ or Brno items, and feed reliably. I DO have the genuine articles, but also use the Norincos. FYI, the Norinco 10 rounders are also unreliable.