You are correct. A laser supplemets the iron sights, and as I mentioned earlier, in bright sunlight (most of the times I go to the range) you need them.
"Socialized Medicine is the Keystone to the Arch of the Socialist State.” -Vladimir Lenin
"I predict future happiness for Americans if they can prevent the government from wasting the labors of the people under the pretense of taking care of them." - Thomas Jefferson (An early warning to Obama care)