Thompson Center Encore Prohunter Black Muzzleloader stock set will fit all Encore and ProHunter frames. The forend fits all Encore, Bergara, and ProHunter Muzzleloader barrels, and also has the attachment screws. The butt stock is equipped with Flex-Tech technology: FlexTech TECHNOLOGY T/C teamed up with Sims, known for their recoil reduction technology, to develop a process that absorbs shock and vibration. The result is the FlexTech recoil reduction system. Reduces felt recoil by 43% Absorbs harmful recoil and vibration that punishes the shooter and damages or loosens scopes. 4 synthetic recoil arches create a crush zone that allows the stock to compress during the recoil process. The limb saver recoil pad has dual compression chambers that displace the shock over a broad spectrum. All of this is built in to the stock of the gun to give you, the shooter, better performance and comfort in the field.