I don't play with this one as much as I should. Armalite AR180B, that I bought new in 2003. It takes AR magazines, has an AR trigger group and a Polymer lower. I have added the dot sight, changed out the fixed factory muzzle flash hider, and replaced the hinge pin. It has given good service, and is every bit as accurate as a decent factory AR15.
I am going to upgrade the optics, changing out the factory scope mount for a Stormwerk Picatinny rail, and I'm thinking a Primary Arms 3X compact prism scope.
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Sam......