Colt 727 Style 14.5" XM4 M16A2 AR-15 Upper Receiver - A2 Carry Handle, 5.56 NATO 1:7
This Colt 727 style upper receiver assembly is built around a fixed A2 carry handle upper with A2 rear sight and a 14.5" 5.56mm NATO barrel marked "13629 MP 5.56 NATO 1/7". It includes a fixed A2 front sight base, two-piece carbine handguards, and an A2-style flash hider.
The 14.5" barrel is not pin & welded.

