Standard V1 Barrel Features 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 this barrel rivals custom work and deliver the best in accuracy and performance. The 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. No gunsmithing required. Standard V1 Barrel Specifications Model:Standard Series:V1 Firearm Fit:S&W M&P 9 Twist:1:10 Barrel Finish:Bronze PVD Barrel Material:416R Stainless Steel Barrel Type:Match Grade Barrel Features:Target Crowned