Ruger Mark IV Spring Pellet Pistol .177 (4.5mm)

.177 caliber pellets
Breakbarrel
Spring-action piston
Fluted barrel
Single-shot
Single-stage trigger
One-stroke cocking mechanism
Maximum velocity up to 360 FPS (with 7-grain pellets)
Manual/automatic thumb safety
Fiber optic front sight and adjustable fiber optic rear sight
Checkered/soft grip panels
Barrel length: 5.3″
Overall length: 11″
Weight: 3.15 lbs.