According the the Trijicon site the standard TA01 is 9.9 ounces and 5.9" in length. Pretty darn close.
http://www.trijicon.com/na_en/produc...b.php?pid=TA01
That's without a rail mount. But the Japanese scope appears to me to be too low to use properly on an AR without a riser. Probably evens out in the end, but I don't know for sure.
Based on the price of the Trijicon offerings, I'm guessing that the lack of products in this class is the cost of manufacturing and the limited market. For 1/10th the price you can get all the optical clarity and magnification of an ACOG with a higher weight and without the durability or illumination. Most guys who don't need that durability will gladly carry an extra 16 ounces to save $900.
That's not a bash on Trijicon. They offer a great set of products and I wish I had one, but it's not for everyone.
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