Helical Flutes Dissipate Gas, Hide Muzzle Flash
Streamlined unit reduces muzzle flash with four, 15° helical flutes. Provides Vortex technology for Remington 700 Tactical, Savage, and AR-style .308 rifles. Grooved to accept a Smith Enterprise Direct Connect sound suppressor. Comes with 5⁄8"-24 thread pitch and .905" thread length.
AR-15, Issue:11, Page:025
Big Book Catalog, Issue:72, Page:173