Thread cover or thread protector is nice and neat looking thingy. Textured surface ensures that the cover will go when threads are needed again. Officially this is for MP5, but suits any replica with 14 mm counterclockwise threads. Thread covers are often seen on pistols. Protip: did you make a custom silencer or other muzzle device? Glue this to the inside and your creation now has threads that will surely last!
