This Madbull 2 Inch Outer Barrel Extension has the following features:1. CNC Lightweight Alumninum with Level II Black Anodize (seamlessly integrates with Madbull black outer barrels).2. CCW threaded on both ends.3. Hides extra inner barrel slack.4. Adds space for quick detach or other barrel accessories.5. Solves common issues: a) inner barrel longer than outer barrel. b) RIS longer than outer barrel.6. Recommended for use with Madbull outer barrelsINNER BARREL STABILIZER O-RING KEY FEATURES:1. Designed to improve accuracy by reducing vibration of inner barrel while firing2. Tested with Madbull inner barrels and Madbull outer barrels3. Made of rubber
