Yeah we've already done a comparison between this thing and a genuine ME (sport), the build quality is the exact same, everything matches 1:1 so I assume it's just old stock that the factory rebranded to Kublai (while leaving the TE markings) and is selling for half-ish the price.
I can find the same unit in Italy for €50 but at that point I can spend the extra €10/15 and get a genuine ME.
All this bollocks so I can squeeze 10 more metres of range off my M4s while gaining a whole lotta compatibility issues with magazines