If you've come across the problem of having your slide getting caught on the outer barrel -Your not alone.....
- Your gonna need to start with drilling the bottom side of the outer barrel. There is not really a lot of room for error so make sure that you mark the area where you need to drill and do it carefully. You only have about a quarter of an inch to work with.
If you have a WE version there is a little mold type circle that you can see in the picture. I marked my drilling point on the bottom lip of that circle. (see Pic)
Also use as small a screw that you can work with thats not cheap! -Because you don't want it breaking.