I've never encountered any problems with these on a paintball field. You got to check if your field only plays with full mask otherwise they are able to take the bb's with no problem. Im not sure if they are rated the same because the ESS have a rating called hmm (at work don't have the box) which shows them to be able to resist to some kind of ammunition and the g&p don't have the same one. When ill get back home ill tell you which rating the ess have.
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