Quote Originally Posted by Dutch View Post
Thnx Guys, good detailed insights! the challenge was actually to fit a PH-16 (non M) on a Mk3. I guess its searching for a proper PH16M then, unless anyone has succeeded in doing so? maybe with a bit of metal work it is possible.
The no-suffix PH 16, as you can see from the catalog sheets, was made for .22 rimfires with receiver tubes about an inch in diameter; I used to have one on a classic Remington 550.

The Mk III has a much bigger receiver of course, for which the PH 16M’s base is designed.