The Rearden FHD FH 5/8-24 Nitride is a testament to Rearden's unwavering commitment to innovation and excellence in firearm accessories. Designed to fit Plan B type mounts, this updated flash hider features larger wrench flats on the rear, making installation and adjustments more straightforward than ever. Crafted from 17-4 PH H900 stainless steel, it boasts a robust black nitride finish that not only enhances durability but also provides a remarkable 67 HRC surface hardness, ensuring it can withstand the rigors of both competitive shooting and tactical applications. This model is compatible with Atlas and Atlas XL systems, allowing for seamless integration into your existing setup without the worry of overrun. While shims are not included, they may be necessary for precise timing, especially if your barrel lacks a thread relief. Its crucial to use an alignment rod during installation to guarantee that the entire system is correctly set up, and remember to clean all surfaces thoroughly before torquing the muzzle device and applying Rockset to the barrel. However, be advised that using this flash hider on a Q can may void your manufacturer warranty. Whether you're a seasoned hunter or a competitive shooter, the Rearden FHD FH 5/8-24 Nitride is engineered to meet the demands of serious firearm enthusiasts who refuse to settle for anything less than the best.