I like the Talon grips and have them on all my Glocks.
I would not recommend you use a recoil buffer, just doesn't seem like a very good idea and could lead to problems.
Everyone generally recommends replacing the stock sights. I haven't, yet.
I have the grip plug on most of my Glocks.
I'm not aware of any need for a stainless guide rod, but I know that's a popular add on.
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