I thought 3/8" was pretty standard but according to Skinner this is what he has to say,
The BROWNING SA 22
requires a slightly different sized dovetail than most other rifles.
The dovetail is deeper by .025" We have built the LoPro II sight specifically for this Rifle.
Designed for the Browning SA 22, This sight features a standard 3/8" dovetail which allows for installation on many rifles. The slightly deeper dovetail will work just fine with most standard rifles and allows more clearance than our BARREL MOUNT sight. This can be handy if the dovetail in the barrel is located close to a significant change in barrel diameter.
Elevation and Windage are easily adjusted and lock with set screws to hold firmly in place. As with all SKINNER SIGHTS the LoPro II accepts any of our 5 APERTURES for the PERFECT sight picture.


















































