This little curiosity is essentially nothing more than a metal accessory rail attach vertical grip. What makes it unusual, besides the fact that it is two pieces of Aluminium screwed together, is that it is very small.
Smaller than even stubby grips that came out not too many years ago, this little thing is only 55mm long and about 20-25mm in diameter. Such a tiny thing works well on smaller weapons which might find even stubby grips rather to encumbering and addition for a compact weapon. A prime example would be a select fire railed pistol or small SMG.
The tiny grip is a strange thing but would make a nice addition to a long railed frame on a racegun, particularly those with fully automatic or select fire capability and are large and or raucous enough to benefit from such a grip.
TSC makes these grips in different colors; the color is not added in a coat but is done though an anodizing process which means the color is in the surface of the metal and can not be scraped off.