The NcSTAR VG137 MIL-SPEC 6 Position Buffer Tube with Castle Nut is essential for firearm enthusiasts aiming to enhance their rifles' functionality and aesthetics. Constructed from high-quality aircraft-grade aluminum, this buffer tube guarantees a durable and precise fit with MIL-SPEC collapsible buttstocks. MIL-SPEC 6 position AR buffer tube and castle nut. Designed to fit MIL-SPEC collapsible buttstocks. Made of precision machined aircraft grade aluminum for durability. Black Hard anodized finish. AR buffer and buffer spring not included. Dimensions: 7.3"L X 1.4"W X 1.4"D. Weight: 5.1 oz. Enhance your rifle's performance and customize your shooting experience with the NcSTAR VG137.