Hi the gun is not new it is used. I tried tipping the mags forward as I was loading them and backwards nothing seems to allow them to lock home unless I press the mag release slightly, It only needs to be pressed about 1mm for it to allow the mags to then slip into place, Every mag looks OK to me with now signs of damage or wear.
The mag catch looks standard to me but having never owned a Vector before I can't be 100% sure.
I have tried to get some pictures to help with this.