Gauss Barrell or:

Electromagnetic speed modifier for a bullet. Aside the point that putting a magnetic enhancer in front of a gun when the bullet is shot initially by a gunpowder blast does not make sense at all (since a gauss barrell is usually a type of gun for itself) it may look strange but if it was put directly on the gun the whole barrel would get magnetized :x

I never thought of the gap as too bad and the enhancing system actually looks cool, but then the gun model i use only has 1/3 of the gap your gun has so it might've never struck me as "too far from the barrel" x.x

But then theres the problem with the dual barrel weapons too - the single barrel of the Gauss enhancer does not line up with them because its made for single barrel guns, which would practically mean you destroy it with the first shot you take

but meh, Games with Magic and Logic xD