ProMag
FN AR Style Carbine 55 Round 5.7mm x 28mm Drum Magazine - Black
55-round drum magazine - Fits the FN 5.7X28MM AR style carbine - Magazine body constructed of a proprietary DuPont Zytel based polymer - Blue steel upper magazine tower - Injection molded magazine follower - Magazine spring formed from heat treated stainless steel - Made in USA
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