Here are the latest new product details from Madbull:
1 INCH BARREL EXTENSION KEY 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 firing
2. Tested with Madbull inner barrels and Madbull outer barrels
3. Made of rubberMore Info and Photo: http://tinyurl.com/1inchbarrelextension
(Madbull)