You don’t have an Accu-Lug unless you had a 110 with an Accustock that you took apart. Did you purchase a 110 in an Accustock and removed the Recoil lug at some point? They are only factory. There are no aftermarket Accu-lugs.

Edit: Sorry, you said the front. I was looking at the hole behind it. (Didn’t see the other hole in the picture at first.) I’m not sure what that for.