This, or determine which screw spacing you have, rifle or pistol. And acquire the correct one.You should be able to purchase a forend from SSK.
Nice!Usually SSK barrels have "rifle-spaced" dual screws. Adding a forend with a hanger bar one great way to accuracy on the t/c encore or tender.
The pictured forend has a deep groove to hold a hangerbar. Very necessary with heavy recoiling calibers & custom bbls.
Mike B View attachment 416521