I bought a .223 12fv at bass pro earlier this month. I didnt notice it when i was in the store, but when i got home i found the recoil lug to appear offset. Long story short i pulled it apart and found what seems to measure out to be a large shank lug on the small shank barrel. Luckily i had an old lug laying around so i replaced it myself. Just a heads up and something to check out before you take a new rifle home.