This 8-position Buffer Tube is machined from industry-standard 6061-T6 aluminum with a MIL-A-8625 Type III, Class 2 hard anodized finish. The design features precise drainage holes that remove water from the system in marine environments. CMC Triggers Buffer Tube Kits are produced entirely in-house and are backed by their 100% satisfaction guarantee and lifetime warranty. With the Buffer Tube Kit being such a critical component in the assembly of AR-style firearms, providing a secure attachment point for the buffer spring and buffer. By bringing the manufacturing of this kit in-house, they have been able to engineer a product that is flawlessly created in a single pass through CMC's Mazak Integrex machine, going from raw material to final assembly in a matter of minutes. By maintaining complete control over the manufacturing process, CMC can ensure consistent quality, tighter tolerances, and faster turnaround times for their Buffer Tube Kits. Features: 8 Position Buffer Tube (A5 Length) Mil-Spec A5 Style Buffer, 3.8oz High-Quality Recoil Spring Castle Nut & QD Receiver End Plat