The analytical and test results from the MRC Phase I program indicate that the development of an accurate in-bore detection and trigger system is feasible for standard Army 105 and 155 mm artillery barrels. The system is based upon X-ray transmission and beam interrupt by the high mass denisty projectile as it travels up the barrel. The proposed Phase II effort will take the system from the Phase I conceptual feasibility stage through development such that a working prototype system will be delivered to the Yuma Proving Ground at the end of the Phase II effort. This will be accomplished by defining the specific performance requirements with the Yuma personnel, performing trade studies and developing a conceptual design, conducting laboratory tests to support the design optimization, and conducting field tests of a bread-board system at the Yuma test site. These activities will support Prorotype and Critical design Reviews which will allow the Yuma personnel to study and approve the design. Finally, MRC willfabricate and deliver a prorotype system to Yuma for their testing and assessment. MRC will deliver system specifications and conduct training and safety classes. THe effort will be documented with a Final Report and Phase III plans to commercialize the system.