These are exact replicas of the HK Maritime mag that costs $50-$60ea This magazine looks, feels and functions just like the HK Maritime Mag. If you had them side by side it would be hard to tell them apart. This mag has a steel follower and special corrosion restistant finish. This is a fabulous and high quality mag for the price. It has all the features of the HK Maritime mag at a fraction of the cost. They are heavy steel with steel anti-tilt followers. Made by KCI. 5 for $65 10 for $120 Here is a link to the HK version. Check out the pricing. http://www.bigskyguns.com/HK-HK_AR15_M16_M4_High_Reliability_30_Round_Mag.html Here is what HKParts.net sell the clones for: http://images.google.com/imgres?imgurl=http://www.hkparts.net/shop/pc/catalog/416korean30rnd_2261_thumb.jpg&imgrefurl=http://www.hkparts.net/shop/pc/viewCategories.asp%3FidCategory%3D64&usg=__KsRYKcLocCiyJR0rT7puXNVJ-Bw=&h=150&w=150&sz=4&hl=en&start=2&um=1&tbnid=sKm77DKZr5yXQM:&tbnh=96&tbnw=96&prev=/images%3Fq%3Dkorean%2B416%2Bmaritime%2Bmag%26hl%3Den%26client%3Dfirefox-a%26rls%3Dorg.mozilla:en-USfficial%26sa%3DN%26um%3D1 add 3% for credit cards. Silver coins accepted as payment as well.