Vintage Thermold Magazine Spring (10 Coils, Length Of Spring) For .223/5.56x45mm Cartridge. Material High Grade Quality Stainless Steel. Replacement Spring, Will Work In Most AR Design Magazine. Date Manufactured Early 1990's, In Excellent Condition And Very Reliable. OLD-BUT-NEW !!!  Price $11.95 For 3 Springs !!! (64 Sets Available). Made In The Great U.S.A. !!! Please Look At All Pictures, Buyer Pays Shipping, Ship Only In THE GREAT U.S.A. !!! Thanks For Looking At This Listing !!!