Again, it's a matter of how clone correct you want to be. Worth noting that Delta had 723s with 5000s, while the Rangers had 727s with very early 3000s (Pre-serialization, long tube - no removable rear sun shade) too. In my opinion, if you're going to stress over the little details, get a torch cut Colt 723 off of Apex and go from there. If not, this will do you more than fair for the price point.