A magazine for a firearm comprises a magazine shell, a main magazine spring, and a follower assembly. A symmetric multiprocessor data processing system includes multiple processing units. The system also includes an amplifier for receiving a signal photon beam and the pump photon beams and producing an amplified photon beam of the first wavelength, where a number of photons in the amplified photon beam being greater a number of photons in the signal photon beam and the signal photon beam includes a portion of the sensor photon beam reflected from a target. Baseline metrics and associated deviation ranges are automatically determined and can be periodically updated.