John
They may tell you in their reply that the requested hole is too close to the now-drilled hole (or) .. don't laugh please... they may tell you to see a optometrist because their tools to troubleshoot this inidicate the purchaser's (you) meaurements were incorrect. [
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When/if it fails for you again, there are other front sights that will correct your problem. Changing sights will not void your warranty with other unrelated parts on your rifle.... ie... lock, trigger... etc.