For what its worth, TTAG did a review of the XCR-M and ran into accuracy issues too. The gun was sent back to Robinson Arms to have it checked, and there were problems with the gun. After they were fixed, accuracy improved.
http://www.thetruthaboutguns.com/2014/08/daniel-zimmerman/gun-review-robinson-armament-xcr-m-part-2/
Could be that your original gun had similar issues.
http://www.thetruthaboutguns.com/2014/08/daniel-zimmerman/gun-review-robinson-armament-xcr-m-part-2/
Could be that your original gun had similar issues.



















































