A couple things. First, the Stock trigger on a Colt and LMT are for all intesnive purposes.... the same. Perfectly servicable for a carbine.
With that being said, LMT Defender 5.56 guns do not come with the LMT 2 stage (that is not that great of a trigger anyway). You could buy a Defender/Sopmod/2 stage lower with is $550-600 when in stock throw a LMT 16" upper for $538 and then add a LMT Auto BCG for $190...........and your at almost $1300 with no sites/mags. You could get a 6920 and it comes with sites, a few mags and you can spend the difference on a SSA or a Aimpoint Pro.
https://www.rainierarms.com/?page=shop/detail&product_id=1040 for $1371 with rear sight but no Sopmod or
https://www.rainierarms.com/?page=shop/detail&product_id=2577 for $1600 with Sopmod and rear. As you can see you are much better off like redneck said buying componets and slapping them together yourself. You will save a good amount of cash, IF you need the LMT 2 stage and SOPMOD. Otherwise, there are better products out there for equal or less money (BCM KMR build for instance).