John, yes, the fake suppressor is removable, it just screws on. Underneath it has 1/2×28 threads. So you could easily add a 9mm suppressor that fits 1/2×28 threads. Hope this helps.

Well, looks like you've got your answer below, enjoy the holidays!

John, the fake suppressor is attached on 1/2×28 threads and is fully removable to add a real suppressor. Cheers and stay safe!

John, yes sir, the extension is removable, barrel is threaded 1/2 x 28 so you can attach a suppressor. Have a great day!