I'll do that right away. And the constructs weaken relative to the amount of damage they take.
So, for instance, if I converted a gun into hard-light and proceeded to beat someone with it, the gun would likely shatter after 5-8 hits. If I hit it against a solid surface, it would likely shatter in 4 or less. As soon as I throw a construct, however, however, the gun would hit something and then shatter, relative to the scale and size of the object. So a car wouldn't necessarily shatter straight away, but the gun would.