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For: Classic Army E90 Metal Upper Receiver for Red DotProduct Information:
I got this product in and immediately installed it. First i would like to say that it is weighty! What i like the most is that it feels like it balances the P90. The motor, battery and gearbox in the rear versus the Metal Upper Receiver up front. I have a classic army p90 and when i disassembled the plastic upper receiver i can tell you i will never go back. It weighs about 2 ounces compared to what i believe is 5 pounds (metal receiver) The metal receiver does not need certain things from the plastic one however i will say that the release button on the upper receiver must be removed from the plastic one and transfered to the metal one. The red-dot sight unscrews easily and slips into the metal receiver and the rail does the same (with no frustration) Besides the P90 itself, the metal upper receiver by Classic Army is by far one of the best purchases i've ever made in airsoft.