Can a pre- safety upgrade slide be used with a post safety mod manual safety FCU ?

I have a complete manual safety FCU with M17 grip frame. I also have an older stainless pre safety mod slide.
Are the 2 of them compatible? Tried sending the slide back for the upgrade, but they wouldn't take it back unless it was part of complete pistol that was pre upgrade.

Thoughts?

This message has been edited. Last edited by: 50 cal,

Posts: 220 | Location: out of my mind. | Registered: June 11, 2000

50 cal

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Found the answer on YouTube from SIG. The slide must have the new cut or it will have a dead trigger when the trigger is pulled.

This message has been edited. Last edited by: 50 cal,

Posts: 220 | Location: out of my mind. | Registered: June 11, 2000