The Master Bench Block - AR15 is a Master Grade build tool that holds five different gun parts in eight orientations, allowing for easy removal or installation of 13 distinct pins and gas rings. The bench block is designed with embedded magnets to securely capture any pin you punch out, eliminating the risk of losing small components during assembly or disassembly. The Master Bench Block - AR15 features clear, engraved labels indicating where each component fits and what size punch is needed to knock out specific pins - an invaluable feature for complex assemblies. Additionally, it includes storage spaces specifically designed for common size pins and a no-slip coating that ensures a firm grip on your workspace. This innovative product makes your project less of a chore and more of an engaging activity. Holds five different gun parts in eight orientations for easy removal or installation of 13 distinct pins and gas rings. Embedded magnets securely capture any pin you punch out, preventing loss of small components during assembly or disassembly. Clear, engraved labels indicate where each component fits and what size punch is needed to knock out specific pins - a valuable feature for complex assemblies. Includes storage spaces specifically designed for common size pins, enhancing user convenience. No-slip coating ensures a firm grip on your workspace, preventing the block from sliding around during use. Facilitates effortless removal of trigger assemblies by knocking out two 5/32" pins through dedicated slots. Allows bolts to be placed in vertical positions for installing three gas rings with ease. Meticulously designed to simplify the process and elevate the entire experience of gun assembly or disassembly. Acts as an extra pair of hands during your gun build, providing stability and precision throughout the process. A testament to Real Avid's commitment to delivering Master GradeA(R) innovation, quality and durability in gun tools.