Description
If you're setting up a Browning A-Bolt chambered in WSSM for a scope, you want a base that fits the correct action and gives your optic real room to work at distance. This EGW rail (part number 43302) is a one-piece Picatinny mount machined specifically for the Browning A-Bolt WSSM, which Browning refers to as the SSA action. The 20 MOA of forward cant built into the rail borrows elevation from your scope's adjustment range, so you can dial for longer shots and keep more usable travel in the turret.
What Makes the A-Bolt WSSM 20 MOA Rail Work
The base is cut from domestic 6061 T6 extruded aluminum, then tumbled, sandblasted, and finished with a matte black Type II anodizing that holds up to field use and keeps reflection down. It carries a center spread of 3.018 inches, an overall length of 6.276 inches, and sits about four-tenths of an inch from the top of the receiver to the top of the rail. At roughly two ounces, it adds almost nothing to the rifle's balance. A relief channel milled down the center trims weight without giving up rigidity, and in a lot of setups it won't block factory iron sights.
Fitment and Setup Notes for the WSSM Base
This is important: the 43302 fits the A-Bolt WSSM (SSA) action only. It does not fit the Browning AB3, the X-Bolt, or the A-Bolt Mountain Titanium in .300 WSM. Browning occasionally chambered different cartridges in a given action length, so it's worth measuring the hole spacing on your receiver against the 3.018-inch center spread before you install. The bevel on both sides makes the rail ambidextrous, and the Picatinny profile accepts a wide range of rings and optics.
Mounting hardware comes in the box. EGW suggests torquing the screws to around 20 inch-pounds with a drop of blue thread locker for a setup that stays put shot after shot. Everything from the rail to the screws is made in the USA.
Key Specifications
- Manufacturer: EGW (Evolution Gun Works)
- MPN: 43302
- UPC: 841370106103
- Model: A-Bolt
- Fits: Browning A-Bolt WSSM (SSA) Action
- Cant: 20 MOA
- Rail Type: One Piece Picatinny
- Material: Domestic 6061 T6 Extruded Aluminum
- Finish: Matte Black Type II Anodizing
- Center Spread: 3.018 in
- Overall Length: 6.276 in
- Height: 0.4 in (top of receiver to top of rail)
- Weight: 2 oz
- Hand: Ambidextrous
- Mounting Hardware: #6-48 x 1/4 Screws and T-10 Bit Included
- Made In: USA
What’s Included
- EGW Browning A-Bolt WSSM Picatinny Rail (20 MOA)
- #6-48 x 1/4 mounting screws
- T-10 bit
Frequently Asked Questions
Which Browning rifles does the A-Bolt WSSM 20 MOA rail fit?
This base is built for the Browning A-Bolt WSSM action, which Browning labels the SSA. It does not fit the AB3, the X-Bolt, or the A-Bolt Mountain Titanium in .300 WSM. Since Browning sometimes chambered different cartridges in a given action, measure your receiver's hole spacing against the 3.018-inch center spread to confirm before installing.
What does the 20 MOA cant on this rail do for me?
The 20 MOA of built-in forward taper tilts your optic slightly downward relative to the bore. That effectively adds elevation, letting you dial farther for long-range shots while keeping more adjustment left in your scope's turret. For a varmint or precision setup it's a handy edge when you want to stretch the distance.
Does the rail come with everything I need to mount it?
Yes, the mounting hardware is included in the box with #6-48 screws and a T-10 bit. EGW recommends torquing to around 20 inch-pounds with a drop of blue thread locker for a lasting hold. You'll still need your scope rings separately, and the Picatinny profile works with standard Picatinny or Weaver rings.
Will this rail block the factory iron sights on my A-Bolt?
In many setups it won't obstruct the factory iron sights, thanks to the low profile that sits about four-tenths of an inch above the receiver. That said, sight clearance can vary by rifle configuration, so it's smart to check against your specific gun. The ambidextrous beveled design keeps the footprint clean on both sides.




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