Did plenty of research and finally settled on ATS and I could not be happier, very well made, tight, holds mags really well.
M4 Six Pack Shingle
The ATS M-4 Six Mag Shingle Pouch looks, from the front, to be the ATS Triple Shingle, but appearances are deceiving. This pouch holds six M4 magazines in a stacked, leveled configuration in the same amount of MOLLE space that the Triple pouch holds three. It's also slimmer than stacking two Triple Shingles on top of each other.
The pouch is about 9 1/2 inches wide by 6 inches tall, and about 2 1/8 inches deep. It uses 6 channels and 6 rows of MOLLE space. The M4 Six Mag Shingle weigh