It's rather simple, the G260 uses a dowel pin that goes into two holes in the barrel and it's secured by the case when the barrel is fully inserted.
While the G250 has that clip that's visible from the outside.
The G250 clip is thicker than the G260 pin and the position is different as well. So it most likely won't work.
While the G250 has that clip that's visible from the outside.
The G250 clip is thicker than the G260 pin and the position is different as well. So it most likely won't work.