Truglo Buckline 3-9X40mm Black BDC Rifle Scope
- Finish-Color:
- Black
- Min Magnification:
- 3x
- Max Magnification:
- 9x
The Truglo Buckline 3-9x40mm rifle scope is built for hunters who need an affordable, reliable optic for medium to large game—whitetail, hogs, and beyond. This variable-power scope delivers the magnification flexibility that matters in the field: 3x for close-quarters brush work, 9x for reaching out when the shot demands precision. The 40mm objective balances light-gathering capability with a manageable profile, while the BDC reticle lets you compensate for bullet drop and extend your effective range without constant scope adjustments.
Truglo engineered the Buckline around hunter priorities: durability, clarity, and simplicity. The one-piece aircraft-aluminum tube withstands hard use, and nitrogen gas filling keeps moisture and fog out so your glass stays clear in temperature swings. Fully coated optics maximize brightness and contrast, critical when conditions deteriorate or game appears in low light. The matte finish eliminates glare and blending, and generous eye relief means you won't get caught off-guard by recoil.
Field adjustments are straightforward. Coin-style windage and elevation knobs live under screw-down caps to prevent accidental bumps, and the durable leaf-spring mechanism holds zero reliably. Removable lens caps protect the glass, and the scratch-resistant finish keeps the scope looking and performing like new season after season.
Key Features
- 3-9x variable magnification for adaptable hunting ranges
- 40mm objective lens for strong light transmission
- Bullet Drop Compensating (BDC) reticle for holdover calculations
- Nitrogen-filled, fully sealed optics resist fogging and moisture
- One-piece aircraft-quality aluminum tube for strength and durability
- Fully multi-coated lenses enhance brightness, clarity, and contrast
- Generous eye relief accommodates most shooting positions and recoil
- Coin-style adjustments with screw-down caps prevent unintended shifts
- Matte non-reflective finish eliminates glint and improves stealth
- Removable lens caps included
Specifications
| Magnification | 3-9x variable |
| Objective Lens Diameter | 40mm |
| Reticle Type | Bullet Drop Compensating (BDC) |
| Tube Material | Aircraft-quality aluminum, one-piece |
| Lens Coating | Fully multi-coated |
| Windage and Elevation | Coin-style adjustments with screw-down caps |
| Finish | Matte non-reflective |
| Sealing | Nitrogen gas-filled, water-resistant, fog-proof |
| Adjustment Type | Durable leaf-spring mechanism |
Frequently Asked Questions
What game is this scope suitable for?
The Buckline 3-9x40mm is designed for hunters pursuing whitetail, hogs, and other medium to large game. The variable zoom and BDC reticle make it adaptable to typical hunting distances where these animals are encountered.
What does the BDC reticle do?
The Bullet Drop Compensating reticle lets you estimate holdover at extended ranges. Instead of constantly adjusting elevation knobs, you align your intended point of impact using the reticle's reference marks, helping you take more confident shots beyond typical hunting distances.
Is this scope waterproof?
The scope is water-resistant and fog-proof. It's filled with nitrogen gas to prevent internal fogging and is sealed to resist moisture in wet conditions. While designed for rainy and humid field use, it is not rated for submersion.
What magnification range works best for hunting?
At 3x, the scope offers a wide field of view for close-range or moving-game situations. At 9x, you gain magnification for distant targets or detailed glassing. The variable range lets you dial in what fits your specific hunting scenario and distance to game.

