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. - Blast deflector can be fitted to the following mounts: - YHM Phantom Adapter - Silencerco ASR - Dead Air Keymo - Griffin Armament Plan-A - Q Plan-B - Area 419 Hellfire - Specifications - 2 Piece Blast Deflector - YHM Phantom Q.D. Adapter - 1-3/8-24 Thread Pitch - Material 17-4PH Stainless Steel - Length: 2.25 - Weight: 4.768 Oz. - Finish: Melonite QPQ - Made in the USA.