Colt has licensed different companies to manufacture Colt branded ammunition over the years. Examples of this are:

2013 Colt Hunting & Defense Match- Manufactured by Black Hills

DoubleTap Ammunition: https://doubletapammo.com/collections/colt-ammunition-1

2016 – Present (7 Jun 2020) Colt Defense- Manufactured by DoubleTap

2016 – Present (7 Jun 2020) Colt National Match- Manufactured by Double Tap

More information on the release of DoubleTap Colt-branded ammunition can be found here: https://www.ammoland.com/2016/06/doubletap-produce-exclusive-colt-defense-colt-national-match-competition/#axzz6OgviFCwQ