This is a Geissele Automatics Mount known as the Super Precision, model 05-403B.
The Super Precision ACOG Series was developed specifically to work with the Trijicon 4x power ACOG series of optics. These mounts are precision machined from a single piece of 7075-T6 high strength aluminum. Utilizing Geissele's update of the classic nut and bolt method" this mount will attach your ACOG to your weapon with 2"800 pounds of clamping force" and features 4 shear lugs for maximum rigidity and return to zero.
Features:
Precision machine from a single piece of 7075-T6 high strength aluminum
