Fits any magazine from a single stack 9mm to a .45 double stack while maintaining a low profile. Right or left handed (Ambidextrous). Ammo rounds can face to the front or rear. No screws or adjustments necessary. Ready to go out of the box. When you draw a magazine from the Universal Mag Carrier Gen 2 it decreases back to its thinnest profile, keeping out of the way when not in use. LIFETIME WARRANTY & 100% SATISFACTION GUARANTEE Sold Over 500,000 Units! Sold to CIA, FBI, DEA, & LEO