The Umarex Gauntlet is available in .177, .22, and .25 caliber, and has all of these features:

See the video here of the quietness and incredible accuracy of the Umarex Gauntlet, as seen on American Airgunner TV: https://youtu.be/weMPhd1wOJ0?t=243 

• EXTREMELY ACCURATE 10-shot repeater
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• 3,000 psi, 13 cu. in. removable tank (Ask about our 70% larger 360 cc tank with regulator) 
• 1,150 psi regulator means consistent shot strength
• Incredibly quiet - fully moderated
• Adjustable Single-Stage Trigger
• Height adjustable cheek piece
• 11mm Dovetail rail
• Bolt action
• Easy foster quick-disconnect fitting
• Pressure release key
• Includes 1 (10 shot) rotary magazines and 1 single shot tray