Crosman DPMS / R1 / MPW / A4-P Full Breakdown - Part 1 : Upper Receiver and Handguard.

Part one of the full breakdown series, please use appropriate tools to ensure positive end results.
Lower receiver breakdown : • Crosman DPMS / R1 / MP...
Assembly preparation : • Crosman DPMS, MPW, R1,...
Full assembly : • Crosman DPMS, MPW, R1,...