Yankee Hill Machine has been machining rifle parts and suppressors in Massachusetts since the 1950s, and their cans are some of the best value in NFA — the R9 and Resonator on rifles, Turbo K and Turbo T3 on 5.56, plus the sRx and Phantom mount systems. Gallenson’s carries YHM suppressors, mounts and muzzle devices, and handles the NFA paperwork in Salt Lake City.