Great choice, the 22 ARC is an exciting caliber for an AR-15 build! Here are some suggestions for components to consider:
Barrel: Check out KAK Industry for precision barrels specifically designed for the 22 ARC.
Bolt Carrier Group (BCG): Look for BCGs that are compatible with the 22 ARC, such as those offered by CMMG.
Upper Receiver: Customize your build with a complete upper receiver, which can be found at various retailers like AR15Parts.com.
Magazine: Choose a magazine that can feed the 22 ARC, like those compatible with the 6ARC.
Double-check compatibility with your other components and ensure everything is suited for the 22 ARC cartridge. Good luck with your build!