RIVAL ARMS BARREL FOR GLOCK 23 CNV 9MM V1 THREADED BLACKRIVAL ARMS BARREL FOR GLOCK 23 CONVERSION TO 9MM V1 THREADED BLACK Feature Match grade precision drop in barrel 1: 10 Twist 6 groove rifling CNC machined from 416R stainless steel billet results in superior corrosion resistence and durability Low temperature vaccum 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