Brand new Match-grade precision drop-in barrel 1:10 Twist / 6 groove rifling CNC-machined from 416R stainless steel billet results in superior corrosion resistance and durability Low-temperature vacuum PVD coating creates a durable barrier against wear and tear even in the harshest environments BORSLICK™ Boron Nitride DCD (Dynamic Compound Deposition) inner bore treatment resists heat and carbon buildup Target crowned muzzle Individually hand inspected for accuracy No gunsmith required Limited lifetime warranty Made in USA Not interested in trade Thanks