Muzzle Thread Protector

thingiverse

This screw-on sleeve is designed to safeguard the muzzle threads of specific firearm barrels when no muzzle device is installed. Its circumference features a ribbed design for grip, allowing it to be screwed on and off manually. Supported thread specifications include: - 1/2"-28, commonly used for .223 Remington and similar chamberings - 9/16"-24, commonly used for .40S&W, and sometimes for 6.5 Grendel - The author fitted this to a [Grendel Incursion barrel](https://www.shopalexanderarms.com/DIY_Parts_Components-6_5_Grendel_16_Incursion_Barrel.html) by Alexander Arms and found it to thread on perfectly. - 5/8"-24, commonly used for 6.5 Grendel/Creedmoor and for various .30-caliber chamberings Future-supported thread specifications include: - M15x1, commonly used for 7.62x51 mm - M14x1 LH, commonly used for 7.62x39 mm It's unclear at this time how this thread protector will handle the heat of the barrel under normal use, so this may be a pointless endeavor aside from the learning experience regarding thread specifications and maximum temperatures. The threads were created with Dan Kirshner's [Threads library](http://dkprojects.net/openscad-threads/) in OpenSCAD, using oversized thread diameters by 0.5 mm.