Gun Barrel Stock:
6061 high-quality aircraft aluminum
Barrel Length:
16.5" 18.5" barrels with threaded muzzle ends. Rifle liner runs the full length in barrels.
Standard Features: Non-fluted barrel. 1/2" x 28 TPI threads with threaded protective cap.
Diameter:
.920 Bull Barrel Style
Shank Size:
.001 Oversized (may require minor hand fitting)
Chamber:
.22 LR Bentz Chamber - can use standard or match grade ammunition. Hyper-velocity ammo, such as CCI Stingers are not recommended.
Liner:
4140 Steel - Button rifled
.050 Thickness on LR & WMR (Magnum) liner, 6 groove
Rate of Twist:
1:16 - 22LR and WMR
1:9 - 22LR Sub-Sonic (40, 50, 60 grain ammo / accuracy range 25-50 yds.)
Caliber: .
22 Long Rifle, .22 WMR, .17HM2 (mach2)
Weight:
Approximately 1 oz. per inch per length of the barrel
Anodizing:
This is an electrochemical process that chemically infuses the color into the aluminum and will not chip, peel or scratch.
Break in period? 
Black matte barrel