Do a visual inspection to check for damage. Use a good light and a 10x magnifying glass. Look for burrs, gouges, steps or other signs of damage. Basically you're looking to see if the hole is clean & round. You can test fit the pin to see if the fit is loose.
I cannot tell you how much damage is unacceptable short of the pin falling out after installation. A little bit where the pin will stay in during casual plinking may not hold during full auto fire in a hot firefight, for example
Last edited by MistWolf; 06-19-10 at 23:56