I have 2 swing safety's on my Mauser builds, a PTG, and a Wisner safety.
I love the PTG because it's a 3 position safety that allows unloading a live round from chamber while still blocking firingpin.
The Wisner and it's shroud was machined by another fella, and I installed it on a Turk Mauser chambered in 6.506, it still needs some smoothing out because it lifts cocking piece back a tad far, which isn't necessary.
The PTG cost 150.00 I believe and the Wisner was around 75.00.....