I was wanting a light gun that I will carry in the pursuit of hogs on foot over rough terrain.
If that's the case, why are you choosing an AR? I didn't see any mention of caliber, but if you are talking the usual .223/5.56mm I wouldn't think it to be a good hog gun, particularly in rough terrain where shots are likely to be fast, and at short range.
Now, if you are talking about a .458 Socom or a .50 Beowulf, that's a different matter, and trust me, those guns, as light as can be done, will kick, most noticeably.