TexasCHLforum.com

To prevent the possibility of death or serious personal injury, Colt advises anyone who has purchased a Colt MSR since March 5, 2021 to stop using it immediately and visit ColtRepairMSR.com or call Customer Service at 1-800-971-3216 to see if your specific MSR is affected.

Found this short article at the NRA's American Rifleman site that explains a little about the issue, and give a summary of model numbers and serial number ranges affected: https://www.americanrifleman.org/conten ... r-of-msrs/.