PICTURE SHOWS A BASE, THERE IS NO BASE, BARREL IS DRILLED AND TAPPED FOR A STANDARD 4 HOLE BASE. PLATFORM: MATCH GRADE MACHINE. CALIBER: 6.5 PRC. RATE OF TWIST: 1:8. FOREND SCREW SIZE/SPACING: 8-40 / 5 Centers, therefore any Encore rifle forend will work well. SCOPE BASE: Silver 6 Hole Base Included.