This 27-round magazine from ProMag is designed for use with AR-15s chambered in 6.8 SPC.The magazine body is constructed of heat-treated steel with a black oxide finish with a spring formed from heat-treated chrome silicon wire.The injection-molded magazine follower provides reliable feeding for consistent performance.ProMag AR-15 6.8 SPC Magazine27 Round CapacityMade of Heat-Treated SteelOrder your ProMag 6.8 SPC magazine online today!Score big savings and fast shipping on all your favorite rifle and pistol ProMag Magazines available online at Ammunition Depot.Score big savings and fast shipping when you shop our large selection of cheap bulk ammo for sale.