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I have my lug ground off and sometimes wish I didn't as several bipod mounts attach to the lug.
Depending on your stock you may want to fill in the bayonet slot with epoxy
If you look at where the front sight connects to, you can see it's actually a sleeve that is 1 piece with the bayonet lug that goes around the barrel. From what I can see, it looks like it's pinned on in 2 places only.