All 1911 safeties require fitting.
I used this safety for a twin ambidextrous 1911 project and they work beautifully! They come with an extended hammer pin that hold the right safety against the pistol. The safety is easy to fit (just takes time and patience). The only problem I had was my own fault, I thought I would try to get the slotted pin to grip even tighter (didnt really need to) and pinched the open slot with pliers and the top slot broke off. Other than that, it works great and I couldnt be happier.
