Designed to reduce flash by nearly 99%, the Surefire® Closed-Tine Flash Hider is an ultrareliable flash hider, featuring a patent-pending design with robust tines built to withstand the rigors of combat and high-volume target performance. Precision-machined from US mill-certified steel bar stock, this flash hider features a durable nitride finish for superior corrosion resistance and lasting field service in harsh, fast-action environments. ½ x 28 threads. Compatible with most Fast-Attach® suppressors.