This will require a $200 ATF NFA Tax Stamp. 

Payment would be up front when ATF transfer form is filed (form 4 I believe). Easiest way is to pay like $35 to Silencershop online to process it. The transfer would be from my Trust to you or your Trust. I hold on to the suppressor until the ATF notifies me and sends the new Tax Stamp with new owner (you), then it is transferred. The process requires fingerprints on the buyers part etc. Easily done with Silencershop kiosks in certain gun stores around here. ATF filing time is normally 6-12 months. 

I bought this for $600, not including my $200 stamp cost. Asking $450

I am also selling my Sig MPX that I had this attached to. See gun listings. 

This comes with a quick disconnect attachment, which is currently on the suppressor. There is a threaded adapter that is in the photo but not attached