I've recently looked on CDNN at some 40/30 Rd looks like Metal Replacement Magazines an they were 20 bucks. But i looked up reviews on these metal "replacement" magz and have seen some TERRIBLE reviews. My little brother got the Tapco Polymer ones with the Metal Floorplate and Says they are very nice. They Are 17.99 for a 20 rd mag. Which one iin you guy's opinion would be the better mags to buy? I mean I kind of like the box mag that came attached to the SKS when i bought it but i want to have a couple of Detachables just incase.