I am trying to install a Magpull Miad Grip and trigger guard to my N4. I am realizing that trying to remove the roll pin from the existing trigger guard might not be a just "go for it" process. So, is there a specific punch (size, #, shape,material?) technique (support method) to removing it with out breaking the receiver trigger tabs? After I get it started out do I drive it "all the way thru?" or as it comes out one side do I then grab it with a needle nose pliers and pull? I'm really trying not to have a failed surgery on my new N4

Any tool suggestions that I might need for minor adding and subtracting on my rifle would be appreciated.