Homemade Suppressor Shoot-out

homemade suppressor shoot out. Sig Sauer Mosquito. 22 LR 1200 fps ammo. No sub-sonic.
First a completely made at home from freeze plugs and steel tubing.
The other three assembled from wix fuel filter holders bought on Ebay or Alibaba. All made or assembled in Idaho. No ATF stamp required.
8"x 1" freeze plug model. drilled, threaded and welded at home.
6" x 1" Black Aluminum Fuel Filter 1/2-28 for NAPA 4003 WIX 24003. Drilled and assembled at home.
8" x 1" silver Aluminum Fuel Filter 1/2-28 for NAPA 4003 WIX 24003. Drilled and assembled at home.
8" x 1 3/8" Black Aluminum Fuel Filter 1/2-28 for NAPA 4003 WIX 24003. Drilled and assembled at home.
all under 72 db using standard velocity ammo. The 1" 3/8" consistently under 60 db.