Faxon Muzzlok Stainless Steel Plan B Flash Hider | 5/8×24 | .375″ Bore

The Faxon MuzzLok Stainless Steel Plan B Flash Hider in 5/8×24 with a .375 inch bore offers superior flash reduction and effortless suppressor compatibility for .30 caliber and 6.5mm rifles. It is machined entirely in the United States from premium stainless steel and uses the patented MuzzLok system for quick, tool free installation and secure timing. No shims and no crush washers are required anywhere in the process. That alone changes how muzzle device installation feels.

What the Faxon MuzzLok Stainless Steel System Solves

Timing a muzzle device is the part of an AR build most people dread. Crush washers deform unpredictably, shim kits require trial and error, and getting the ports oriented correctly often takes several attempts with a torque wrench and a lot of patience.

The MuzzLok system removes that entirely. A locking collar design lets the flash hider be hand timed and locked firmly in place, maintaining precise suppressor alignment and delivering consistent performance even after repeated installation and removal cycles.

Features of This Flash Hider

The Faxon MuzzLok Stainless Steel Plan B combines flash suppression with suppressor mounting duty.

• Patented MuzzLok system for tool free installation and secure timing
• No shims or crush washers required at any point in installation
• 5/8×24 thread pitch, the standard for .30 caliber and 6.5mm rifles
• .375 inch bore sized for .308 WIN, 300 BLK, 6.5 Creedmoor, and 6.5 Grendel
• Premium stainless steel construction machined entirely in the United States
• Suppressor ready design that maintains alignment through repeated mounting cycles

Specifications and Caliber Compatibility

The 5/8×24 thread pitch and the .375 inch bore together define what this device fits. That combination covers .308 Winchester, 300 Blackout, 6.5 Creedmoor, and 6.5 Grendel, which spans large frame AR-10 builds and precision bolt rifles alike. The generous bore diameter also means it will safely clear projectiles across that range of chamberings.

Stainless steel is the material choice, and it is the right one for a muzzle device that may serve as a suppressor mount. Muzzle devices under a can see extreme heat cycling, and stainless holds its properties and its dimensions better than many alternatives under those conditions.

Domestic machining is worth mentioning because concentricity is everything on a suppressor mount. A device that is even slightly off axis puts a bullet closer to the baffles than it should be. Find more muzzle devices and build components in our parts and upgrades collection.

Installation, Suppressor Use, and Care

Clear the rifle and confirm the chamber is empty. Clean the barrel threads, check that the shoulder is square, and thread the device on by hand. Time the flash hider as the instructions specify and lock the collar down. The whole process takes a fraction of the time a crush washer install does.

Verify alignment before running a suppressor. A simple alignment rod check is cheap insurance against a baffle strike, and it is worth doing every time you move the device to a different barrel.

Expect carbon buildup on and around the Faxon MuzzLok Stainless Steel device, especially under a suppressor. Soak and brush it during cleaning, and inspect the locking collar threads to keep them free of hardened residue that would interfere with timing on the next installation. Never use a pipe wrench on the device body, since jaw marks in stainless are permanent.

Reconfirm zero after installation or removal, since anything mounted at the muzzle can shift point of impact. Faxon builds this device to be moved between rifles, so plan on a quick zero check each time.

Fast to install, easy to time, and ready for a can whenever you are. That is a great deal of capability from a single part that costs less than an afternoon of ammunition. Ships direct to your door, no FFL required.