The Leupold VX-Freedom 4-12x40mm Rifle Scope, does not have locking turrets.
Leupold recommends using their Leupold Alumina Flip Back Objective and Eyepiece Lens Cover Sets for this VX-Freedom 4-12x40mm Rifle Scope. The flip caps can be found by using the link below:
https://www.opticsplanet.com/leupold-alumina-flip-back-objective-and-eyepiece-lens-cover-sets.html
The Leupold VX-Freedom 4-12x40mm Rifle Scope is compatible with the CDS system from Leupold.
To mount the Leupold VX-Freedom 4-12x40mm Rifle Scope to a Browning BLR you will need a compatible scope base and 30mm rings or a ring/base mount. The DNZ Products Browning BLR - Short Action 30mm High Mount at the link below should work for that set up.
https://www.opticsplanet.com/dnz-products-browning-blr-short-action-high-mount.html
If you are mounting the Leupold VX-Freedom 4-12x40mm Rifle Scope to an AR10 I recommend using the Leupold 177094 Mark AR integral Mounting System. This mount can be found at the link below.
https://www.opticsplanet.com/leupold-177094-mark-ar-integral-mounting-system-1-pc-base-30mm-ring-combo-for.html