SilencerCo's ASR Flash Hider offers one hand on, one hand off attachment/detachment. Its patented resonance suppression effectively eliminates the tuning-fork effect common with competing 3-prong flash hiders. This model is compatible with the Specwar, Saker, Omega, Hybrid, and Harvester 338 ASR mounting system. Size 7.62mm Type Flash Hider Model ASR Series Flash Hider Material Steel Thread Pattern 1/2"-28 tpi