AR15 M16 M4 .308 Rifle 5/8x24 Jam Timing Clocking Nut Thread Steel Adjustable Crush Washer For Barrel Flash Hider Choke Suppressor Muzzle Brake Compensator THREAD STEEL CRUSH WASHER (5)

Feature

Fits 5/8"x24 Threaded Barrel Diameter. Jam Nut for Accurate and Fine Alignment of Devices
Can Be Used Many Times For Multiple Installations. Mil-Spec CNC Machined
Made of Heat Treated Steel Corrosion Resistant Matte Black.
Jam Nut Prevents Over Torquing The End of the Barrel.
Threaded onto the barrel before the muzzle device and then is backed out to tighten against the back side of the muzzle device.

Description

Fits 5/8"x24 Threaded Barrel Diameter. Jam Nut for Accurate and Fine Alignment of Devices. Can Be Used Many Times For Multiple Installations. Mil-Spec CNC Machined. Made of Heat Treated Steel Corrosion Resistant Matte Black. Jam Nut Prevents Over Torquing The End of the Barrel.Jam Nut is used in place of crush washers or shim kits to properly align muzzle devices such as muzzle brakes and flash hiders that need to be timed. Threaded onto the barrel before the muzzle device and then is backed out to tighten against the back side of the muzzle device. This is far easier than messing with Shim Kits or Crush Washers since you can use exactly the amount of torque you want and it will always be perfectly aligned. This prevents over torquing the end of the barrel.