Saw these at $520 on Amazon Sept 12, 2021. Most other outfits want up to $600. Going to wait around until Black Friday and try to snag a deal. Working up a plan to use an adapter to attach a machined aluminum faux air soft silencer $27 found a ebay adapter for $16. Get a square of sound deadening foam to make disks and Im in bid-ness for under fifty bucks.