ProMag FNHA4-FD 20rd 308 Win Fits FN SCAR17 FDE Polymer Magazine. 20-round magazine fits FN Scar 17 in 308 Win (7.62x51). Magazine body constructed of a proprietary DuPont Zytel based polymer. Injection molded magazine follower. Magazine spring formed from heat treated chrome silicon wire. Made in USA. Flat Dark Earth finish.