Never been a fan personally, because once those two are empty, your reload time then becomes much longer unless you’re happy to drop £90 on the ground. Have a look at a ‘readymag’. That way you can always have a second mag on the gun, but not attached so you can still have functional pouches.
After using it for a bit, you’ll get a good idea even without counting when you’re about to run out. If I feel like Ive got maybe <5 bb’s left before I move from cover or enter a building, I’ll change the mags out anyway. Unless you run a dump pouch, always designate a pouch for putting half empty/empty mags.
