Solid construction. While the threads on the suppressor body itself may not fit most AK flash hider adapters due to different factory tolerances, the manufacturers got it spot on with the 14mm included adapter. This thing is ROCK SOLID on my DBoys AKS-74U custom 455mm barrel beast. It's awesome because: 1) It will will allow you to cover another ~18CM of inner barrel, 2) It will improve the balance of the AKS-74U which is notoriously back-heavy, even the airsoft one! 3) It's ROCK SOLID. I swear, I think I'll probably break the rifle before this thing gets loose. 4) Nice aluminum construction, realistic looks. Love it.