Colt's Manufacturing Company LLC

Genuine Colt® replacement parts must be installed correctly to ensure proper function and safety. They are intended for installation on Colt guns only, and are not intended to be used in other products.
Genuine Colt® parts installed at the factory may be protected under Colt's Limited Lifetime Service Agreement. Parts installed by other gunsmiths will not be covered. Substitution of non-Colt parts may void or impair your Lifetime Service Agreement. Colt will not accept liability for any subsequent malfunction or defect that in any way arises from, in connection with or as a result of the installation of a non-Colt part in a Colt firearm.

Parts not identified with an asterisk (*) in Colt's Parts Catalog may be installed at the Colt factory, or by a skilled gunsmith (but note the potential impact on Lifetime Service Agreements, as described above).
All parts identified with an asterisk (*) in Colt’s Parts Catalog must be installed at the Colt factory.

Unless you are a skilled gunsmith yourself, never attempt to replace parts on or repair or modify a gun in the absence of expert assistance.