This Knights MK12 mod I rail was installed ( my guy is usually good to go) about a half inch off center. The clone correct kac rear sights have to be set all the way left and I still have to aim a touch left to impact on center. The peek sights are the same way. An optic on the upper has no issues. I really don’t want to send it back to get fixed and I can’t sell the upper as is, so is there a home remedy for this?