For those who want the ultimate in heavy-barreled .22 autoloaders, we offer the M597™ LS HB rifles chambered in 22 Long Rifle, 22 Win Mag, and 17 HMR. All guns have 0.825-inch diameter, 20-inch carbon-steel free-floated barrels furnished clean with no sights. Matching alloy receivers have scope mounting grooves, and are drilled and tapped for the M597 scope rail. The Model 597 LS HB uses the same twin steel guide rail system found in other M597 rifles that provides silky-smooth functioning and perfect bolt alignment on lock-up. Stocks are brown laminated wood with a flat finish and come furnished with attached sling swivel studs. Detachable box magazine holds ten rounds for the 22 Long Rifle and eight for the 22 Win Mag and 17 HMR.