Stackable extended barrel for AK style rifles

simple fun build of a 10 cm barrel piece , comes with or without fluting , best used with a muzzle brake on the end to hide the thread (compatible with both muzzle brakes i made). Can be stacked indefinitely , so go crazy with it , and if you do , post the results.

Outer diameter : 20mm

Inner diameter : 9mm

thread - 14x1L on both sides