Stable Performance For 500,000 Compression Cycles
Replacement, drop-in fit chrome silicon extractor and ejector springs from David Tubb provide long term durability and up to 80% more power than factory springs in AR-15 rifles. Precision manufacturing and high quality steel give extremely consistent compression cycle for smooth operation over thousands of rounds.
AR-15, Issue:09, Page:026
Big Book Catalog, Issue:67, Page:029
SPECS: Chrome silicon steel.