If the timing is off, that is not a deal-killer. Just a trip to Colt, and they'll have it right for you at a very nominal charge (usually about $87 including return shipping). Of course, instead of just having Colt repair and re-time (really makes them function like new), there is always the option of having them do a factory custom tune on the action ($190 plus $30 return shipping), and man, is that nice!