I once had a gentleman bring me a nice early 16ga Browning A5 which he had on trial. He had shot it & it had jammed. The barrel was plainly marked 2 3/4" but I knew the gun should have been from the 2 9/16" era. Examination showed the barrel was a replacement & the receiver had not been modified. I explained to him what would be required to make it function with regular 2 3/4" shells & he decided to pass on it & wait for another, which I thought was a smart move. If you plan to use 2 3/4" shells be certain the receiver is compatible. On the A5 just changing barrels is not enough.

Miller/TN
I Didn't Say Everything I Said, Yogi Berra