![Phase 5 Pistol buffer tube, buffer and spring kit Phase 5 Pistol buffer tube, buffer and spring kit](https://cdn11.bigcommerce.com/s-k5jq3j85wp/images/stencil/152x200/products/954/4194/PBT_C_main_59272_1559178681_1__72394.1559334996.jpg?c=2)
Known for producing high quality AR accessories, Phase 5 manufactures the Hex-2 buffer tube specifically for pistol builds. This receiver extension is CNC machined from US certified 7075 billet aluminum and can be used with the included nitrile foam pad or a pistol stabilizing brace from SB Tactical. The round rear of the tube meets the hexagonal section and is designed for braces that accept a 1.2" round tube. It is not compatible with adjustable braces such as the SBA3, SBA4, or SB Tactical PDW. Phase 5 and SB Tactical worked closely together to develop this high-end system component. This package comes in at 7.4" overall length and a total assembled weight of 11.5 oz.