Yankee Hill Machine Resonator R2's in stock and ready to form 4 to you, or ship to your FFL.  For local customers, we do all paperwork, fingerprints and photos, in-house.  $579
https://jjgunsupply.com/p-6234-yankee-hill-resonator-r2-30-caliber-rifle-silencer-w-qd-muzzle-brake.aspx