No it does not lag on all the levels just on the first one with the mech and the flying level with the moon base.

The explosions are not causing the lag time on the first level with the mech it is the trees. Can fix it with clipping range.

On the moon base flying level it is the skyscrapers causing the reload weapons to lag.

I am trying to make it work faster in the moon base level but the only way to do it that I have noticed is to shorten the clipping range. that works for both levels but then things are left out of view and it looks kind of strange.

I also wanted to note before anyone saw it. I put in the wrong muzzleflash tga on the second video it should only show one flash not two in front of the gun. I will fix this.

Thank you for your comment. It will be a while before I update the videos with the problems fixed I am very tired and been working on these levels for a few days now.