NEW PRODUCTION THOMPSON CENTER BARRELS MADE IN NH. PLATFORM: THOMPSON CENTER Encore PROHUNTER. CALIBER: 6.5 CREEDMOOR. RATE OF TWIST: 1 IN 8. 810 HEAVY CONTOUR ANY RIFLE FOREND WILL WORK FINE. FOREND SCREW SIZE/SPACING: 8-40 / 5 Centers. THREADS: Yes 5/8-24 THREAD. SCOPE BASE: DRILLED AND TAPPED ONLY FOR A STANDARD T/C 4 HOLE BASE.