Standard MFG states the following feature set for their Thunderstruck double barrel .22 Magnum revolver,
Caliber: .22 Win Mag
Capacity: 8 Rounds
Barrel Length: 1 1/4
Cylinder Material: High Strength Steel
System: Double Barrel Double Action Revolver, Two Rounds Fired With Each Pull of the Trigger
Frame Material: 7075 Aircraft Grade Aluminum with Anodized Finish
Safety: Integral Articulated Trigger Safety, Transfer Bar Blocks Firing Pins From Hammers
Barrel Material: Steel
Grip: Polymer
Weight: 18 oz