ACM is not a brand, it's short for All China Made usually for "out of factory" stuff before being branded officially.
Example : M14-JAE, the KART one is only the ACM in a fancier box
... but for vests it's usually crap.
As for vests, except for Flyye, I never saw a nylon hold well my most basic mistreatment.
Don't waste your money, just buy a good Pantac/Condor/Flyye with pouches (or like me use real stuff). It's more expensive but it's worth it.
Tous les jours nous nous endormons plus instruits mais pas forcément moins bêtes...
I can do a CTRL+ATL+DEL on your gun !
Gun doc in Montreal on AEG, GBB, GBBR and Bolt rifle (gaz and spring)
Heavy custom builder (including painting)