Traditionally the methods to increase firearms accuracy, particularly at distance, have concentrated on
barrel isolation (free floating) and substantial barrel wall thickening to gain rigidity. This barrel stiffening
technique did not completely eliminate barrel movement but the problem was significantly reduced to allow
a noticeable accuracy enhancement. This process, although highly successful, came at a very high weight
penalty. Obviously the goal would be to lighten the barrel (firearm), yet achieve even greater accuracy.
Thus, if lightweight barrels could ultimately be compensated for both their static and dynamic mechanical
perturbations, the result would be very accurate, yet significantly lighter weight, weapons. We discuss our
development of a barrel reference sensor system that is designed to accomplish this ambitious goal. Our
optical fiber-based sensor monitors the barrel muzzle position and autonomously compensates for any
induced perturbations. The reticle is electronically adjusted in position to compensate for the induced barrel
deviation in real time.