Model 700 Stainless 5-R .308 Winchester 20 Inch Stainless Steel Threaded Barrel 5/8x24 TPI X-Mark Pro Trigger H-S Precision Stock Black/Green Marble Finish 4 Round. X-Mark Pro Trigger and features a M700 stainless steel barreled action with 5-R mil-spec threaded, tapered barrel (5/8x24) with thread protector, the same barrel used in the M-24 sniper rifles. H-S Precision stock. 11.25 inch twist. Five lands and grooves and eleven degree target crown.