A potential defect on trigger modules produced/sold May 2007-Dec 2007 could cause doubling. Contact CMC at 888-879-4612 or
http://recallqa.com/CMCAR15 to obtain instructions on how to get a free mailing package and quick repair/replacement. Naturally, they want you to stop using the trigger module. Regards
91503 single stage flat small pin
91507 " " flat large pin
91501 " " curved small pin
91505 " " curved large pin