The heart of every NEMO rifle begins with an in house machined barrel. These barrels start with premium Bartlein blanks, and then they are chambered, contoured, and finished right here at NEMO Arms on our own machines. A match chamber, NEMO medium contour profile, and Bartlein's world class single point cut rifling process ensures a solid base for an accurate rifle. 16" or 20" Stainless Steel Bartlein blank single point 5R rifling Mid-length gas system (16") or Rifle Length gas system (20") .308 Match chamber Threaded 5/8-24 tpi Recessed crown for use in DPMS/LR308 pattern rifles DOES NOT INCLUDE BOLT! Mfg: Nemo