Upon purchaes we will select ONE at random and ship it to you.
These Rock River Arms Uppers are lightly used Police Take offs. They all have a rear sight and a standard bolt carrier group.
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Worked great
Mounted it to my colt factory lower and had zero wobble. Shot it at 100 yards with the GG&G sight it came with and it grouped just fine. I shot 60 rounds (3X 20 round magazines) from this rifle and functioned with no mishaps. Happy with the product.