Acculite CZ 455/457 20" 17 HM2 Threaded Aluminum Sleeved Barrel .920
Gun Barrel Stock: 6061 high-quality aircraft aluminum
Barrel Length: 20" CZ barrels with threaded muzzle ends. Rifle liner runs the full length in barrels.
Standard Features: Barrel without flutes. Muzzle end 1/2" x 28 TPI threads with threaded protective cap.
Diameter: .920 Bull Barrel Style
Shank Size: .001 Oversized (may require minor hand fitting)
Liner: 4140 Steel - Button rifled
.050 Thickness on LR & WMR (Magnum) liner, 6 groove
Mach 2 as optional caliber by barrel selection on website
Weight: Approximately 1 oz. per inch per length of the barrel