I just pick up one of the last production models of the series. fn spr a5m xp. It is a fine rifle. With the heavy threaded barrel and A5 stock, It is a tank of a gun. The bottom metal is steel. I wish I could fine a 10 round magazine for it. No luck so far. Plenty of 5 rounders everywhere. This gun is the best factory offering shooter i have seen. YMMV