Defiance Tenacity long action with magnum boltface chambered in 300PRC.
This is the newer Tenacity with the integral recoil lug, so it's not pinned it's one with the action.
BenchMark 28.5in match grade Heavy Varmint bbl with 1 in 8 twist. Chambered and threaded 3/4 × 28 by Zero Dark Precision...