i can confirm this now. you press Triangle Twice to bring up Grenades. It's not the easiest thing to remember, let alone do correctly, while in the heat of battle. i usually only use them from a major distance, or end up pulling up my second gun a few times erring.
oh yea your definitely correct cal! i was just running around like a moron and kept forgetting to turn on the armor and such. but after you get all the modules it gets so much easier haha fun as hell too!
Colt 45 and two zig-zags, Baby that's all we need We can go to the park, after dark, smoke that tumbleweed!