The Nikko Stirling Mountmaster AO SFP 1" (1-inch tube diameter) line is one of the most popular and affordable options for shooters just starting out with air rifles or .22 LR caliber firearms. The acronyms describe its optical and structural features in detail: "AO" (Adjustable Objective) means it features manual parallax adjustment on the objective bell (from approximately 10 yards to infinity), ensuring a sharp focus at both short and long distances. "SFP" (Second Focal Plane) indicates that the reticle is located in the second focal plane, meaning it maintains the same visual size regardless of the magnification setting chosen.
Key Technical Specifications
- Construction and Durability: Built with a one-piece, matte-black, aircraft-grade aluminum body measuring 1 inch (25.4 mm) in diameter. They are purged with dry nitrogen, making them waterproof, shock-resistant, and resistant to fogging caused by thermal shock.
- HMD Reticle: They feature the Half Mil-Dot (HMD) reticle, designed specifically for calculating pellet or projectile drop and manually compensating for the effect of the wind.
- Adjustment Turrets: Quick 1/4 MOA adjustments per click (approximately 7 mm at a distance of 100 meters).
- Included Accessories: A major competitive advantage of this series is that it comes factory-equipped with a set of rings compatible with standard dovetail rails (11 mm), meaning no additional investment in mounts is required to begin using it.
(Important usage note: These scopes are designed to withstand the recoil of light-duty airguns and traditional spring-piston air rifles; however, manufacturers and installers caution that they are not suitable for airguns equipped with a gas-piston system, as this type of powerplant generates a sharp, dual-recoil impulse that can damage the internal lenses of budget-tier scopes.)
Specifications
| Optica y Aumentos | 3-9X40 or 4-16X50 or 4-12X50 or 4X32 |
| Reticle | HMD IR or HMD |
| Tratamiento Lente | FMC or MC |
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