ATI Nova Liberty

If you want quiet, either get the donnyfl or make a similar sized one. Option 3 is make a longer and larger diameter shroud, baffles and air stripper. You'll be spending many many hours in the shop to save just $170 on excellent donnyfl. I also have a machine shop and would buy if I was needing one. Baffles in the factory shroud will never come close to donnyfl results and his quality is second to none. You'll need the adapter for the can too. Just remember to get the .25 set for the .22 as they recommend due to the less than perfect barrel/shroud alignment the Liberty has.