Colt model 6721

This was the first Colt blue label I purchased. The Model 6721 is a 16" heavy barreled AR-15 with "mil-spec" features like a bolt carrier, MP tested bolt and barrel and buffer tube/adjustable butt stock. It is apart of Colt's Blue Label or Law Enforcement/Military line of rifles. During the Clinton Assault Weapons Ban these weapons were not available to be purchased by civilians, but with the ending of that foolish ban Colt now sells their near M4 spec rifles to civilians in free states.

My 6721 has gone through as many changes, modifications, and upgrades that I can do(for now).

When I first assembled the rifle out of the box I had a 7" Free Float Rail installed, a plain Vltor butt-stock, and an EO tech with a Rock River Dominator mount. I think the only thing that has stayed the same is the black Blue Force Vickers sling and a Tango Down pistol grip. I have added and subtracted a Grip-Pod, changed out the Troy 7" rail for a Daniel Defense 12" FSP lite weight and switched out the flash light a couple of times.

Three modifications I have kept and enjoy are the Vortex flash suppressor from Smith, Matech back up sight that I picked up overseas, and the PRI Gasbuster charging handle. All three came from a 'tactical' set up that I find work well.

The major motivating reason behind my transformation for the rifle was that everything I put on the rifle, for an optic, EO, Acog, and now Leupold was that the 16" heavy Barrel on this rifle is so dang accurate.

At first I thought the 4x power ACOG would be the ticket, until I had the opportunity to but a 1.5-5 power Leopold off a co-worker. I had already been searching for a variable power scope to keep up with the "Short-Dot" fad and was leaning toward another Trijicon product (mostly because of price). When a co-worker asked me if I'd like to buy his scope.

Not sure what I was getting I picked up the scope and was impressed with the magnification and clarity. I was sold. Coming home I found a Larue 1.5 SPR mount, and a beefier Vltor EMod stock for what i thought was going to be a heavy scope and rail combo. I again was surprised as the rifle was still lighter than expected when i weighted it against a friends AR 10 at the range.

I guess you could say my proof of concept was when i took this same rifle to a 2 and 3-gun match and got a chance to run it under stress.

Lessons learned from this rifle: From it I was able to figure out what would make a good ACOG set up, another blog on that later. And the benefit of the adjustable low power scope.

Last note, I just decided to add the Surefire 300 to the front of the rifle after reading some other more knowledgeable blogger, now I only need a night match to try it out...