LongIsland, I have had Dennis cut many, many chambers for me as well as sundry other work over the years. Highly recommend him. I had/have not seen a bottom metal work over by him, so had no reference.....thou the stock looks like it could well be of his hand.

Igorrock, I seen that it (floorplate) was serial numbered to the rest, so that triggered my wonderment of if it may have been factory/commercial/originally a release/hinged floorplate.