You can switch top ends on a 1911 full size and the sommander IF you cut down the spring tunnel on the commander slide if you don;t you will batter the frame.The reason this is said is because i am wondering if it is possible to switch top ends between a full size 4506-1 and a 4516-1. I have done this switch and it seems to work fine, but i don;t want to continue to shoot them till i find out if the frame would be damaged.Does the spring tunnel have to be cut like the colt or is it ok to switch them without any mods?
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