by Steve » Wed Feb 03, 2010 6:48 am
Even the real-steel optic have parralax issues. Aimpoint Comp M2's are only parralax free past 50 meters. Eotechs are a bit better, but basically, any time you have a flat sight line (your optic) combined with a curved ballistic path (your pellet) that is offset from your barrel, you will run into some parralax issues at close range and at extreme range.
A better thing to look at, in my opinion, would be to compare the optical clarity of the glass. Test the optic to see how clear the target is, how clear the reticle is, and look for ghost rings or dots. Look at the materials to make sure it will handle at least some abuse. And then get input from users about how it handles vibration from the AEGs, and whether or not there are return-to-zero issues with the optic.
If you can get ahold of one to test it, run a box drill to test the drift. Zero the optic. Shoot a small group. Adjust the optic 10 clicks left. Shoot a group. 10 clicks up, shoot again. 10 right, and shoot, and then a final 10 down. Depending on the quality of the optic, your final group should be identical to your first group.
Then, remove the optic, drop it into a cargo pocket, go for a jog for a half mile or so. Reinstall it in the same spot on the rail. Shoot another group to check if it returns to zero, or if getting bounced around screwed with it.
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