The Tiger Rock Inc. ST002MBH+ST009M AR-9mm Blackhawk Knoxx 6-Position Collapsible Stock Kit is engineered for optimal performance and precision shooting. Built with high-quality materials, this stock kit enhances your firearm with adjustable features catering to your shooting needs.This kit includes a Mil-Spec AR-15 stock buffer tube, along with all necessary components for straightforward installation. The robust design ensures longevity, making it the perfect choice for serious shooters.AR-15 Stock Buffer Tube - Mil-SpecAR-15 Buffer Castle NutStock Buffer End PlateStainless Steel Carbine Length Buffer Spring7 oz Bolt Buffer AR 9mm - Stainless SteelAR-15 M4 Blackhawk Knoxx Collapsible Stock - BlackElevate your shooting experience with this premium stock kit, combining functionality and style.