need some help ID'ing a mag.
friend of mine has a mag w/ absolutely no markings. thought they were KCI. however there are no witness holes either.

he says they shoot fine.
i did a few searches to no avail. also googled it. nothing came close.
obviously a knock-off, but whose?
other info:
-no markings (from above)
-no witness holes (from above)
-fits a g19
-15 rds. of 9mm
-all polymer
-top is 'U' cut
ideas?