I believe he is referring to the 20 gauge framed 870. The 742/7400 stocks will fit the 20 gauge 870, not sure about the 552. I have a 7400 stock and can measure if needed.Not likely. An 870/cf rifle receiver is a lot bigger than a .22 receiver.
The 552 is 1 3/4 high x 1 1/4 wide where metal meets wood.
The 552 is 1 3/4 high x 1 1/4 wide where metal meets wood.