Doesn't look like all the images are just for one object if you mean that.You should apply a checker map on your models to see the texel density its important to get it right if you don't want to have irregular TD across the model. Checker map is used to check the density of texels Its important that little cubes you see…
This is all for one object...? What the...? Ok... Well for a start. It should be on one texture. Not four. Theres so much wasted space its unreal, but worse than that, your texel density is a nightmare, its all over the shop. You have the smallest metal parts taking up MORE space than the body? And cutting "SOME" textures…