Complete rear-end kit for an AR-15 pistol build. Combines the blade-style pistol stabilizer with the full receiver-extension (buffer-tube) assembly so you can close out the back half of an AR pistol in one purchase - no separate stock or buffer-kit hunt required. Kit includes: Blade-style pistol stabilizer Pistol-length receiver extension (buffer tube) Recoil buffer Buffer spring End plate Steel castle nut Fitment: AR-15 pistol builds (not for AR-10). Threads onto a standard mil-spec AR-15 pistol lower receiver. This is the more complete option compared to a tube-only buffer kit, which does not include a stabilizer. Verify the exact components against your build before installing - pistol receiver extensions typically use a slick shaft (no adjustment slots) rather than the multi-position carbine profile.