The Tiger Rock Inc. LCR-T AR-15 Pistol Buffer Tube Locking Collar in matte tan enhances firearm stability while ensuring a secure fit for your pistol stabilizing brace. Crafted from robust T6-6061 aluminum, this locking collar prevents forward sliding on buffer tubes ranging from 1.125" to 1.1875". Designed for both ease of installation and reliable performance, it is perfect for AR-15 enthusiasts. T6-6061 aluminum Matte tan finish Includes hex screw Fits 1.125" to 1.1875" diameter tubes Enhance your firearm's performance and stability with this essential locking collar.