If I planned on running an AR with iron sights only I strongly feel the best option is the fixed front with A1 Rear. I hate that Colt "upgraded" the 6420 from an A1 rear to a A2 rear and renamed it the 6520.

The super lightweight 6420 was the perfect DI KISS Carbine at 5.6#. The 6520 is the same but with unnecessarily complicated and more fragile A2 sights. I have no illusions of shooting 500 meters with the 6520's super LW barrel profile. Let's face it, the 5.56 has ballistic limitations anyway.


Last edited by Architect; 03/19/16 03:29 PM. Reason: Me spel'n stinkz
JYD #123 The great one formerly known as Architect.

I am now a fictional British television police officer (currently a Detective Sgt) at Thames Valley Station. My governor is Detective Inspector Fred Thursday and it’s 1969.