30 round Magpuls mostly, a few 10 round ones for bench shooting, two 20 round metal mags (not sure of make, rarely used), one 20 round Magpul, and two 30 round metal mags (a D&H and a Center Industries). Magpul is by far my preferred brand, though D&H/BCM, Center Industries (they are marked only with 6P199 and build date unless more than a decade old), OKAY, and Lancer are all well regarded.