Hammers 4-12X40AO Air Gun Rifle Scope for High Power Magnum Spring Air Gun Rifle with Solid Mount Built-in Stop Pin 4x-12x variable power for close up look at target down a longer range Fine tuned adjustable objective and fast focus ring for quick and easy targeting One piece scope mount with 4clamping screws and built-in stop pin for holding strength and better alignment 1inch mono tube body design for high shock resistance performance Finger adjustable turret screws. No tools needed when sighting in