Improves Extraction & Ejection Reliability
Stronger spring prevents "extractor bounce" during rapid semi-auto or full-auto fire. Provides extra force against case rim to give AR-15 rifles and carbines reliable extraction from a dirty chamber; ensures fired case is completely extracted and ejected from gun. Recommended for use with black, carbine, extractor spring insert.
AR-15, Issue:11, Page:032
Big Book Catalog, Issue:70, Page:031