6mm ARC Encore 20 Inch Barrel with TSOB Scope Base and Thread Protector 1:7 Twist. SSK Firearms 6mm ARC Encore 20 Barrel with TSOB Scope Base & Thread Protector. Upgrade your Thompson Center Arms Encore Rifle platform with this high-quality SSK Firearms 6mm ARC barrel assembly. Designed for precision and reliability, this 20-inch barrel offers excellent performance for target shooting, hunting, and long-range applications. Barrel Length: 20 inches. Threaded Muzzle: Includes thread protector. Sight Base: Factory-installed TSOB scope rail for secure optic mounting. Compatibility: For T/C Encore and Pro Hunter frames. Details: This barrel provides impressive accuracy and smooth performance. The factory installed TSOB scope base delivers a rock-solid platform for mounting your optic, while the threaded muzzle allows you to attach approved accessories. Barrel is clean, properly fitted, and ready for installation on your Encore frame. SSK Firearms 20 6mm ARC Encore barrel. All parts listed are components only and comply with marketplace policies. Tapered, Special (0.810). 5/8-24, Muzzle Thread with Protector. Carbine (5 Hole to hole). Rifle Spacing – 10×32 Dovetail Locks (Default for Lengths > 15). NOTE ANTLERS NOT INCLUDED. NOTE ANTLERS NOT INCLUDED – Only the barrel is for sale.