Here you have a universal AR-15 double pouch with MRD (mag retention device).
You have different possibilities of attaching the pouch to the belt. 2 places for different loops with 0.75″ distance between holes and 1 place in the middle for Tek-lok style belt attachments.
Also, you have a possibility to attach a pistol double mag pouch to this one and have combined pouch for 2 AR-15 mags and 2 pistol mags in the same setup.
And of course you can adjust retention of mags with MRD devices.
Please check the photos.