Accidentally destroyed the slide by milling into it. Didnt want to mill into $900 gun frame. It wasn't sliding / fitting right on, neither was magazine going in. After destroying it accidentally (slide internals, by filing too much off), realized what i did, and it was not necessary . I realized what was wrong and Now fitting on But i dont feel safe using it (destroyed internals :( ). Will save this for parts and probably buy another. Dont mill into slide, should fit on without it .