This complete (T) barrel assembly includes a Picatinny rail gas block, barrel nut, gas tube and handguard cap.
.875 at the Journal (Under the gas block)
Caliber: .338 Federal
Barrel: 22" Triple Lapped, AISI 416R Stainless Steel Match, M-4 Feed Ramps
Rifling Twist: RH 1:10"
Muzzle Device: None
Front Sight Base: Gas Block with Picatinny Rail