This magazine does not fit the SR-556E model. Blackened stainless steel, 25-shot 6.8mm caliber magazine for the SR-556.
We cannot bill to or ship 25-round magazines to the following states and cities: California, Maryland, Massachusetts, New Jersey, New York, Washington DC, Aurora, IL, Chicago, IL, South Bend, IN, Cincinnati, OH, Cleveland, OH, Columbus, OH, Dayton, OH, Toledo, OH. DO NOT ORDER THIS MAGAZINE, if you live in these locations.