Geissele AR15/M4/M16 Reaction Block – Black Steel

Enhance your gunsmithing efficiency with the Geissele AR15/M4/M16 Reaction Block. Crafted from robust black steel, this precision tool is essential for assembling AR15, M4, and M16 lower receivers. It offers secure positioning at 12, 3, 6, and 9 o'clock, allowing 90-degree rotations for seamless installation of buffer tubes and nuts. This ultra-stable platform frees both hands for smooth, frustration-free work, making it an indispensable tool for dedicated gunsmiths. UPC: 854014005984.