Modern Design & Materials For Consistency, Reliability & Superior Performance
Manufactured exclusively with aerospace-quality, chrome silicon for superior durability and performance. After winding, each spring is heat-treated, shot peened and stress relieved for long-lasting, reliability. 20-round springs are designed for use with standard magazine followers.
AR-15, Issue:10, Page:056
Big Book Catalog, Issue:68, Page:061
SPECS: Chrome silicon steel wire.