Description
The Crimson Trace Hardline 4-12x40mm gives you a genuinely useful magnification range for a rifle that pulls double duty. Whether you're punching paper at the range, ringing steel, or heading into the field, that 4x to 12x window covers close-in work and stretches out far enough to reach medium-distance targets without feeling cramped. It rides on a 1-inch aerospace-grade aluminum tube, so it's built to shrug off recoil and rough handling instead of fussing over it.
What Makes the Hardline 4-12×40 Tick
Glass is where this scope earns its keep. The fully multi-coated, green-coated lenses push around 90% light transmission, which means a bright, clear picture in the early morning and late evening light when game tends to move. The 40mm objective gathers plenty of light without turning into a bulky front end, and the whole optic runs about 14.1 inches long with a manageable weight in the 15 to 16 ounce range. Eye relief sits at a comfortable 3.5 inches, giving you room to get back on target quickly after the shot.
Dialing In the Mil-Dot Reticle
The second focal plane Mil-Dot reticle is the workhorse of the optic world for good reason. It gives you clean reference points for holdover and ranging, and it stays crisp and predictable at your top magnification where most folks do their ranging math. Adjustments run in 1/4 MOA clicks with capped turrets that feature a tool-less zero reset, so once you've zeroed, popping the turret back to zero after dialing is quick and doesn't require digging for a wrench.
Built to Take a Beating
Crimson Trace nitrogen purges and seals the Hardline against fog and water, so weather isn't going to sideline your hunt. It also pairs with the free Trace Ballistic Calculator app to help you sort out bullet drop for your specific load and conditions. Every Hardline scope is covered by Crimson Trace's full lifetime warranty and their well-regarded customer service, which takes a lot of the risk out of the buy.
Key Specifications
- Manufacturer: Crimson Trace
- MPN: 01-01510
- UPC: 810048570331
- Magnification: 4-12x
- Objective Lens Diameter: 40mm
- Tube Diameter: 1 inch
- Reticle: Mil-Dot
- Focal Plane: Second Focal Plane (SFP)
- Illumination: Non-Illuminated
- Adjustment Click Value: 1/4 MOA
- Turrets: Capped, Tool-less Zero Reset
- Eye Relief: 3.5 in
- Light Transmittance: 90%
- Lens Coating: Green Fully Multi-Coated (MOC)
- Overall Length: 14.1 in
- Construction: Aerospace-Grade Aluminum, Nitrogen Purged, Waterproof
What’s Included
- Crimson Trace Hardline 4-12x40mm SFP Mil-Dot rifle scope
- Lens caps
- Lens cloth
- Owner's manual
Frequently Asked Questions
Is the Hardline 4-12×40 a first or second focal plane scope?
It's a second focal plane (SFP) optic, so the Mil-Dot reticle stays the same visual size no matter what power you're on. The trade-off is that the reticle's ranging and holdover subtensions are only true at maximum magnification, which is 12x. Most folks doing precision holdover work will simply crank it up to 12x when they need the marks to be accurate.
What size rings do I need to mount this scope?
The Hardline 4-12×40 uses a standard 1-inch main tube, so you'll want a set of 1-inch rings or a 1-inch cantilever mount. With a 40mm objective, medium-height rings usually clear the bell on most rifles, though bolt guns with large barrels may need high rings. Match the ring height to your rifle so the objective clears the barrel and you get a proper cheek weld.
Does the Crimson Trace Hardline scope have a zero reset feature?
Yes. The capped turrets use a tool-less zero reset, which means after you've dialed in your zero you can reset the turret indicator back to zero without needing a wrench. It's one of the handier features of the Hardline line and makes tracking your adjustments in the field a lot simpler.
Is the reticle illuminated, and does it work with a ballistic app?
The Mil-Dot reticle on this model is non-illuminated. It does pair with Crimson Trace's free Trace Ballistic Calculator app, which lets you plug in your load and conditions to get precise holdover data for longer shots. That combination gives you a solid, budget-friendly setup for stretching your range.





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