I know Magpul recommends the dustcover accessory to take the strain off the feed lips if you store your Pmags loaded. Lancer L5AWMs have the steel feed lips so no storage issues there, but what about all the other poly mags like Thermold, Hera H3, Troy Battlemag, TangoDown ARC, Tapco Intrafuse, Hexmag, etc? Is loaded storage a big no no with poly mags other than the Pmags and L5AWMs?
Has anyone had any warping or issues with loaded poly mags in storage from brands other than Magpul and Lancer?