Prophet River Firearms

Mounting Hardware is Included

This mount fits the following magnum actions:
.300 RUM
.300 PRC
.375 H&H

Before purchasing, please measure your inside hole spacing to confirm whether our mount will work for your application.

Older model X-Bolts had front screw holes that were threaded to the top of the receiver. Newer models now have a deeper countersink. This countersink prevents the mounting screws from engaging multiple threads and can cause the holes to strip out in the receiver. We have changed the depth of the countersink on mounts made after January 2021. The date code can be found on the bottom of the mount. If the last 2 digits are 21 or higher, your mount has the deeper countersink.

Older mounts may require longer front screws. We recommend test fitting the screws before Loctiting to check for proper engagement. If the screws only engage with one thread, please contact us and we will provide longer screws (.335” OAL). If the screws bottom out before tightening the mount, we recommend removing a bit of material from the screw. The front screws can be torqued to 10 in/lbs.

We STRONGLY suggest taking your gun to a qualified and competent gunsmith to have this mount installed.

Rail Type: One Piece Picatinny
Machined From: Solid 7075 T6 Aircraft Grade Aluminum
Finish: Matte Black Hardcoat
Center Spread: 3.93"
Overall Length of Mount: 7.075"
Height: .525" (Top of Receiver to Top of Picatinny)
Weight: 2.5 oz
Quick Disconnect Ring Compatible: Yes
Ambidextrous: No
Compatible with Picatinny or Weaver scope rings.
Mounting Hardware: #6-48 X 1/4 Screws and T-10 Bit Included
Torque Specs: 20 in/lbs

Need a scope mount for your Browning X-Bolt Magnum? Our one piece HD Browning X-Bolt Magnum 20 MOA picatinny scope mount can help. Utilizing a multi-slot design, our scope base allows your scope rings to be mounted virtually anywhere along the base for a quick and easy mounting process.

Older model X-Bolts had front screw holes that were threaded to the top of the receiver. Newer models now have a deeper countersink. This countersink prevents the mounting screws from engaging multiple threads and can cause the holes to strip out in the receiver. We have changed the depth of the countersink on mounts made after January 2021. The date code can be found on the bottom of the mount. If the last 2 digits are 21 or higher, your mount has the deeper countersink.

Older mounts may require longer front screws. We recommend test fitting the screws before Loctiting to check for proper engagement. If the screws only engage with one thread, please contact us and we will provide longer screws (.335” OAL). If the screws bottom out before tightening the mount, we recommend removing a bit of material from the screw. The front screws can be torqued to 10 in/lbs.

We recommend measuring the hole spacing in your receiver to confirm it matches with the dimensions we have published.

Picatinny cross slots run the full length of the rail, which gives the shooter flexibility when mounting scope rings and other accessories. Our one-piece scope mounts are the obvious choice for hunters and tactical shooters alike.

This mount is a Picatinny-style base and compatible with Picatinny or Weaver scope rings.

We machine these in our shop using one of our machining centers. After machining, the mounts are tumbled, sand blasted, and Type III anodized for long lasting durability.

We recommend:
0 MOA - if shooting 0-500 yards
20 MOA - if shooting 500-1000 yards

When zeroing your rifle with a 20 MOA mount, we recommend zeroing at 200 yards.

Installation: We recommend 20 inch lbs of torque and a drip of blue loctite.

The entire mount and accessories (from the mounting screws and wrench down to the packaging) are made in the USA.