Why set up all the guns and then almost never use them?
They set up that Jurassic Park has a well-stocked armory with multiple weapons, yet almost nobody uses them. Muldoon has a SPAS-12 shotgun, but he never gets the chance to use it. Very frustrating. Plus, you'd think an experienced hunter like Muldoon would use a long range, high-powered hunting rifle instead of a shotgun.
Worse still, Grant only gets one scene with his SPAS-12 shotgun, and we don't even get to see him fire it at the raptors--it just cuts to Hammond on the phone hearing the shots. I'm not saying that Muldoon and Grant had to turn into Rambo and blow away a thousand dinosaurs, but it might have been nice to see them at least take down one or two raptors and dilophosauruses.
It seems like poor screenwriting to set up all those weapons and then practically never use them. They may as well not have had the guns at all if they weren't going to use them for much.