Daniel Defense
Replacement upper receiver for Colt large-pin lowers
Daniel Defense's Big Hole Upper Receiver with Feed Ramps is a premium upper part, but it is not the generic small-pin stripped upper many builders expect. The key fitment detail is the big-hole pivot interface. It belongs in builds that specifically call for the matching Daniel Defense large-pivot setup rather than a universal mil-spec upper swap.
Add the Daniel Defense Big Hole Upper Receiver to your build and see how it enhances your platform.