1911 slide to frame fitting calculator

We are still working on this calculator and it is beta. Therefore you may encounter problems or incorrect data. 

When building a 1911 pistol, the frame rails are typically oversized so that you can get the exact fit that you are looking for.

If you are building from an 80% 1911 frame, make sure that your frame is decked before using our 1911 slide to frame fitting calculator. 

To use our calculator, measure your slide in the places indicated in the first picture. Then place the measurements in their appropriate blue box in the calculator.

Then Measure your frame in the places indicated in the second picture and place them in their respective blue boxes in the calculator.

If your frame measurements are within spec, the box will turn green. If you need to cut more, the box will turn yellow. However, if the measurement is beyond spec (too much has been taken off) the box will turn to red. If your frame rail measurements are in the red, you are below spec and your frame may be unsafe.