Enhance the performance and reliability of your firearm with the Surefire Required Spacer, specifically designed for small diameter barrels with shoulder diameters ranging from .560 to .615 inches. This essential spacer ensures a perfect fit and optimal function, making it a must-have for firearm enthusiasts who demand precision and reliability. Constructed with durability in mind, the spacer promises long-lasting performance, even in the most demanding conditions. Installation is a breeze, allowing for a quick and hassle-free setup, so you can focus on what matters most-your shooting experience. Whether you're a seasoned shooter or a firearm hobbyist, the Surefire Required Spacer is the perfect addition to your firearm setup, offering a seamless fit and enhanced shooting performance. Compatible with small diameter barrels with shoulder diameters between .560 and .615 inches. Essential spacer for ensuring proper fit and function of your firearm. Durable construction for reliable performance and longevity. Easy to install for quick and hassle-free setup. Ideal for firearm enthusiasts looking to enhance their shooting experience. Surefire Required Spacer for Small Diameter Barrel with a Shoulder Diameter Between .560-.615 Z-71348