LOL Dragun TES your funny and I'm about to prove your the dumb one.
as you can see in the pic the TES body has a more rounded style and milling where the barrel goes along with the fade anodizing. The mongoose is alot more square except for the top tube that i cut(cant really see the original milling cause I cut it off). Mongoose twisted LPC. Feednecks are different, TES is straight and the Mongoose has a twisted design. Bolts are both mongoose one I dyed black the other is stock. Stock Mongoose trigger frame, drop and twisted grip expansion on the left. I switched over some TES parts(front block, reg, frame and drop) to the mongoose. I can understand the one kit making it not qualify as a mongoose, but it sure aint no TES.