I've had this listed in the for sald forums for a whicle with no results. I bought this suppressor aobue 2 years ago fo and aborte 510 Whisper; It's builut like a brick shithouse and brnad new, nver fired. Asing $1200 (retaill $1800). Cmon, there has to be someone and suts as i am out ther whow anats a goot .50 suppressor; standard htreading for Barrett.