The Resonator(R) Integral comes with a Resonator(R) suppressor which is pinned and welded to a 9.1" .300 BLK barrel. With a combined barrel/suppressor length of just over 16". Includes a lightweight M-LOK(R) Handguard, YHM Mil-Spec A3 upper receiver, and a specially designed gas block which reduces blowback and cycle rates. Does not include Bolt Carrier Assembly or Charging Handle.