Hammers 3-9x40 AO Air Gun Rifle Scope
- Magnification Minimum: 3x
- Magnification Maximum: 9x
- Objective Lens Diameter: 40 mm
- Mounting Type: Dovetail Mount
Last refreshed Jun 22, 2026 · Based on the Amazon listing and published specifications, not hands-on testing.
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ASIN: B0099XIJKCModel: 3-9x40AOCategory: Rifle Scopes
Overview
A 3-9x40 rifle scope built specifically for spring and piston air rifles up to .22 caliber, with internal reinforcement for the two-way recoil these guns produce that regular firearm scopes are not built to survive.
Spring and piston air rifles recoil twice, once forward and once back, which cracks the internals of scopes designed only for firearm recoil. Results split on higher recoil nitro piston rifles: several owners got months of reliable use while at least one reported internal failure within about 80 shots, and another had a stop pin snap after a month of use.
- 3-9x variable zoom with 40mm adjustable objective
- Reinforced internals for piston air rifle recoil
- One-piece mount with removable recoil stop pin
- Fingertight metal windage and elevation turrets
Pros and cons
- At least one reviewer had it fail within about 80 shots on a nitro piston rifle
- A stop pin snapped for one reviewer after roughly a month of use
- One buyer hit an elevation limit that would not move point of aim high enough
Specifications
| Brand | Hammers |
|---|---|
| Model | 3-9x40AO |
| Dimensions & fit | |
| Objective Lens Diameter | 40 mm |
| Item Weight | 1.5 poundshigher than 59% of 238 rifle scopes |
| Construction & materials | |
| Material Type | Aluminum |
| Color | Black |
| Compatibility & installation | |
| Mounting Type | Dovetail Mount |
| Compatible Devices | Rifle |
| Included components | |
| Unit Count | 1 |
| Other details | |
| Magnification Minimum | 3x |
| Magnification Maximum | 9x |
| Night vision | No |
| Sport Type | Hunting |
| Field Of View | 39.3 feet |
Closest rivals on specs
Traditions Performance Firearms 3-9x40 Scope- Item Weight 1.5 vs 1.35 pounds (+11%)
Frequently asked questions
What air rifles is the Hammers 3-9x40AO scope built for?
It is designed for spring and piston air rifles up to .22 caliber and is internally reinforced for the two-way recoil those guns produce.
Does the scope come with a mount?
Yes, it includes a one-piece mount with four clamping screws and a removable recoil stop pin.