The Geissele Automatics AR-15/M4 Reaction Block is a testament to precision engineering and design excellence. Crafted for the discerning armorer, this tool facilitates the assembly of lower receivers with unmatched stability and ease. Its innovative design allows for 90-degree rotation increments, making operations like buffer retainer nut installation quick and effortless.

Ideal for range time and training, the Reaction Block ensures a stable platform for various lower receiver operations. Geissele Automatics is renowned for its commitment to quality and innovation, making this tool a must-have for professionals and enthusiasts alike.

Key Features:
- Manufacturer: Geissele Automatics
- Model: AR-15/M4 Reaction Block
- Product Type: Reaction Block
- Mounting System: Mil-Spec Buffer Tube
- Weight: 1.3 lbs
- Length: 5 inches
- Width: 2.3 inches
- Height: 4.3 inches
- Material: 6061-T6 Aluminum
- Unique Features: Allows 90-degree rotation increments
- What's In The Box: Reaction Block