If you modelled in anim8or, and kept to the X and Y axis (lined them up fairly well), edit these numbers on your Gunspec to look like this;
Quote: "horiz = 0
vert = -35
forward = 50
alignx = -150
aligny = -150
alignz = -150
"
The gun might be off, (It might not even be visible, if the exporter changes it around or something), but mess around with the numbers.
If you cant see it, change the scale to something huge, and move the numbers (as they appear on the snippet). As it appears, position it more correctly with the numbers, and then lower the scale slowly, so you can still see it.
Good luck - Id love to see the weapon
Dan.