Geissele Automatics Reaction Block Black Steel for AR-Style Rifles

The Geissele Automatics Reaction Block is an essential tool for any armorer working with AR-style rifles. Crafted from robust black steel, this block simplifies the assembly of lower receivers by allowing precise 90-degree rotations. Its innovative design accommodates installations at four key positions—12, 3, 6, and 9 o'clock—ensuring a stable platform for various operations. By securing the lower receiver with nylon screws, the block frees both hands for efficient work, making tasks like buffer retainer nut installation quick and frustration-free. Enhance your assembly process with this reliable and efficient Reaction Block.