I got my 45 with the safety ... easier to take it out if I don't like it then try & find the parts to install later.
It's acutally very simple to install. All's you really need to do is remove the rear block roll pin & rear block. On the left side of the block there is a spot for a spring & dedent, then just slip on the safety lever and put the block back in. the lever pivots on the roll pin so just be sure to put the pin in thru the lever. THink you have to remove the 2 fillers on either side of the frame as well if your pistol didn't come with the safety ... think they just slide out.
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