YES I KNOW THE PIC SAYS 444 MARLIN, TRUST ME THE DESCRIPTION IS CORRECT. MARTY EBBINGHAUS W HAUSOFARMS. NEW PRODUCTION MGM CUSTOM BARRELS MADE EXCLUSIVELY FOR HAUSOFARMS. PLATFORM: THOMPSON CENTER ENCORE PROHUNTER. CALIBER: 6.5 PRC. RATE OF TWIST: 1 IN 7.5. 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: COMES WITH BLACK OR SILVER 6 HOLE BASE ATTACHED.