I would pass on the Remo.
There are a number of issues with them besides the rear locking lug.
There is a cut in the action that has to do with an arm leading to the magazine. IIRC, the stock will crack in this location. They can't handle recoil.
I did a job on one that had been incorrectly chambered (a regular shotgun reamer wont fit a rifled barrel)and after looking over the entire arrangement chose to use a late model Mossberg (395K?) instead.

I have worked on two Greeners and my only issues with them are related to sighting and the case usually needs a little help with ejection. 2 3/4 is the max without grinding the block. The factory barrel(rechambered to 12ga) was very accurate with foster slugs and a breeze to clean with a tornado brush.

Tom