They are probably offering 5 round mags becuase there are some states like Arizona that restrict mags to 5 rounds when hunting with a semi auto rifle. maybe they'll offer their mags at a reasonable price. the only five rounders I can find here are john masen and pro mag and they are ridiculously priced from 16 to 30 bucks that just blows me away because my 30 rounders cost me 10. what I ended up doing was plugging off a few 20 round thermolds to 5 rounds 20 round thermolds I get for 9 bucks.