Hello 'SandeProElite', Yes I understand what you mean by the R3 button, but in my case, and in most cases, I hadn't even used the R3 button! But when I run through weapons they are not equipped.
I have stopped playing this game because there is no point in wasting my time with it any further .. and I have the sneeking suspicion that if and when I finally achieve all 'Gold' the trophy like the silver will not unlock. This game for me has been the worst experience - it is replete with glitches, in fact, it is the only game that I have purchased from the PSN store to give so much trouble ... and come to think of it, it is 'THE' only game to ever give me problems, all the other games I have bought have been fine.
I have yet to contact the developers via email, but when I do I will certainly let them know exactly what I think about their dubious under-tested game programming.
Thank you for your comment, and although I truly appreciate it - I am afraid that in this case it does not resolve the problem