It would depend on the particular tests they are allowed to undergo. For example, it's been stated that the M16 needs to be properly cleaned, so any test that w

It would depend on the particular tests they are allowed to undergo. For example, it's been stated that the M16 needs to be properly cleaned, so any test that would emphasis taking a pristine sample and shooting would not produce adverse results and probably make the gun place highly due to its better accuracy. However, were the trials to include sullying the rifle, banging it against something, throwing it on the ground repeatedly, etc. What would the results be then? As another poster mentioned, sometimes in life (and especially in combat I would assume) shit happens, and you need a gun to fire then, not when it's all nice and clean. So it's very easy to game the system, especially if the war games include strictly enforcing weapon maintenance which might not be the case in actual combat.