I have a bunch, really like the Esstac Kywis (use the .308 version ones, they work with 5.56 as well). Also like the HSGI tacos, I even put an esstac .308 plastic insert in one for a lil easier re-insertion of mags, works great.
But for cheap/functional; AR500 has their own brand of simple mag pouch (for pistol or rifle). These are really good quality and don't cost much, problem is they might take forever and a day to get them in stock or ship them out... But IMHO these are the best bang for the buck if you want good/durable stuff and at a cheap cost.
Of course if you want simple and standalone mag-carrier, get on Amazon and buy a simple bandolier, might have to settle for that crappy ACU camo color though (M81 woodland camo is the best, but don't seem to be in stock anymore..). Especially if you just wanna outfit others (wife, kids, friends, etc). Make one pouch a simple IFAK (CAT TQ, gauze/celox-z-fold), then the other two will provide 4x 30 rounders. Which for most situations will probably be more than enough (of course I'm sure in arfcom fashion someone will be along to inform us all about some wild scenario where you might do 5 mag dumps and still need more rounds in order to survive...).