remington action bar 2.jpg[/attachment]Hi, new to the forum. Refurbishing an old 12 ga 1100 my Dad gave to my son. Disassembled, cleaned, replaced a few small parts (magazine plug cap, action spring). Upon reassembly we found a small part attached to the action bar. Finally figured out where it goes. However, the part is either worn or broken. It fits back where it belongs and the gun was functioning previously. I would like to replace this part but it is not identified in any of the parts breakdowns that I have found. I don't want to spend $80+ on a new action bar just to replace this little part. It looks to be some sort of a bushing which is flat on the outside and concave on the inside. I am including a pic to show this little part. Any help with identifying what this is and where I can get one would be much appreciated.

That is a new style one with the operating handle retaining detent in the rear of the handle. From rear to front, this is what goes in the hole:
F91198B 1187 SLIDE BLOCK BUFFER $4.12
F15711 1187 BREECH BOLT RETURN PLUNGER RETAINING RING $4.12
F91199 1187 BREECH BOLT RETURN PLUNGER (12 GA) $4.12
F16791 1187 OPERATING HANDLE SPRING $4.12
F14431 1187 OPERATING HANDLE PLUNGER RETAINER $4.12

Pricing is off a 2014 parts list.