This was the very first generation AR TAD edition and one of the first AR editions over all.
Surfing the internet learned me these TAC AR's Block Oxide coating are pretty hard to find.
Back in 2004 both slotted and plain G10 scales variants were sold through Triple Aught Design.
These Old School AR's (and GB's) feature a three screw pocket clip while the later versions have the one screw clip.
Other differences are the small cut out in the locking liner and the Shield Mark i.c.w. Strider.
Of course the blade also features the TAD logo and stamped number #093.
Another Old School aspect is the pivot showing "Strider Knives".