It's no secret that the key to great accuracy is good training. After that, it often comes down to a match-grade barrel. Built from high-quality stainless steel, precision polished, and treated with premium coatings, these barrels rival custom work and deliver the best in accuracy and performance, round after round. Match-grade precision drop-in barrel with 6 groove rifling, 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 and target crowned muzzle. Threaded barrels and protectors use 1/2-28 threads for comparatibility with after market accessories like suppressors and compensators. All threaded barrels include a color matching Rival Arms thread protector. No gunsmithing required. Barrels for Glock are compatible with both 3rd and 4th generation.