YHM .30 CAL BLAST DEFLECTOR YHM designed this QD Blast Deflector to work with multiple YHM QD muzzle devices. The QD Blast Deflector locks on just like a YHM Suppressor. The Mechanism is fast, positive and virtually impossible to disengage accidentally. The YHM-3135 is designed to completely cover the YHM-3302's mounts. It will also work with the shorter mounts, YHM-3102's, YHM-4302's, & YHM-5M2-QD. Will not fit YHM-3702's, YHM-3802'S, YHM-9923's, & YHM-9853's Specifications Material 4140 Chrome Moly steel Length: 2.69" Weight: 5.4oz. Finish: Melonite QPQ Made in the USA.