What is this?
 

Guys I have not seen this before can any one tell me what the pin is for in the barrel for end lug? Gary

I've never seen one of those before Gary.

Please correct me if I'm wrong, but that appears to be an aftermarket ventilated rib... maybe the folks who installed the rib had a reason for the pin.

Please accept my apologies if it is an original Parker Bros. ventilated rib.

Best, Dean

Is there a pin in the top of the rib directly over that little pin? Maybe it's a cross pin that holds a long vertical pin that holds the rib??? Sounds unnecessary but figured I'd toss it out there.

i have seen this on a single barrel spanish made gun...oly function i seen on it was helping hold forearm on....charlie

Holy Smokes.... That gun has 34" Titanic Steel barrels and a straight grip!! :shock:

Is the pin retaining a hardened insert? The aft surface of the lug bears against the forend iron to keep it tight against the receiver. Maybe the insert is replaceable to maintain the tightness(?)

It is a slotted pin sorry I do not have a camera with me, I am in Wilmington N.C. Megan had some surgery on Thursday, be back home late next week, Dean you are right 34" straight grip D grade, Gary

Roll pins are hardened and slotted. They are normally used to secure an insert. Maybe Richard's suggestion is correct in that it secures a lug that is attached to the rib bottom? Bob

Parker never used any sort of a hardened plate on the forend loop of their barrels. Who knows what the pin on these barrels is for.

When it comes to Parkers I've learned to never say never. That's one killer straight grip D Gary. What happened to the hammers, did they fall off?:)
Best wishes to Megan.

Possibly the roll pin is the axle for a roller. Different type of forend attachment?

I thought maybe it had something to do with the rib but I looked at the two vent rib guns I have and there is no pin. Some type of repair to the lug perhaps. Regardless what a wonderful find.

I hope all is well with Meagan.

It appears that those barrels do not have the reinforced forend loop.
Presuming that the vent rib is of the "aftermarket" persuasion, and the gun may possibly have had an aftermarket BTFE.... and knowing that the non-reinforced forend loop might have pulled away from the barrels because of the extra force applied due to the BTFE, which is pretty common... (again, assuming it may have had a BTFE) that pin may have been an anchor point for a rod that went up between the barrels to the top rib to ensure the forend loop would stay put.

Just a crazy WAG on my part.

Assuming that is not a Parker rib, Dean and Richard are probably right about a pin to attach the forend lug to an extra piece of metal that goes into the middle of the barrels and possibly to the top rib.

Guys it has a splinter for end, Gary

I think the thought process was that at one time it might have had a BTF hence the screw in the lug then returned to a splinter. Either way it's a fantastic Parker. I'd love to take it out on the clays course.