Vortex Spitfire HD Gen II 5x review
Our verdict: 4.2/5. This is the lightweight way to put real magnification on a carbine. At 10.8 ounces the Spitfire 5x carries fixed 5x for a little over half the weight of the Primary Arms SLx 5x36, with a 25 mm objective, an etched AR-BDC4 reticle that still works with a dead battery, twelve brightness settings and an enclosed emitter. The case for it is made best by an owner who swapped out a 1-6x LPVO he never took below 4x. We hold it at 4.2 for three concrete reasons: the mount in the box sits wrong on an AR, adjustments are coarse 1 MOA clicks, and the field of view drops to 23.3 feet at 100 yards.
Owners rate it 4.2/5 across 34 reviews on OpticsPlanet. In stock at around $450, list around $650, stock and price verified August 18, 2026; confirm both on the retailer page.
How we reviewed it: a research-based review built from the retailer specification sheet and the verified owner-review record, read lowest rating first so the criticism is not filtered out. We read 10 of the 32 written reviews, the most critical end. We have not bench-tested this optic; the score is our editorial opinion and owner ratings are attributed to their source. See how we evaluate.
What it is
The Spitfire HD Gen II 5x is a fixed-magnification prism sight: light is folded through a glass prism instead of a stack of relay lenses, which is how Vortex fits 5x into something 3.6 inches long. The AR-BDC4 reticle is etched into the glass with holdovers for 5.56, so illumination is a convenience rather than a requirement, and the emitter is enclosed. Twelve brightness settings include two that work with night vision. It runs one CR2032, is waterproof, shockproof and fogproof, and ships on an MRDS mounting platform for a Picatinny rail.
The case for it: 5x without the LPVO weight
The most useful endorsement in the record is not about glass, it is about a decision. An owner running a 1-6x LPVO plus an offset red dot on a 14.5 inch AR realised he kept the LPVO between 4x and 6x almost all the time, and bought the Spitfire 5x as a lighter replacement for the whole arrangement, reporting the weight and footprint saving as the win. Even the review the retailer ranks as most helpful negative agrees on the fundamentals: it credits the warranty, calls the glass noticeably clearer than the writer's own Burris prism optic for the price, and describes it as the lightest 10.8 ounce optic he could find at 5x. That last point is his claim about the market, not a survey we ran, and we report it as his.
“Lightest weight 10.8 oz optic you can get at 5x. I cannot find another optic that gives 5x magnification, at this quality.”
Most helpful negative review, via OpticsPlanet
The honest catch: the mount, the clicks and the view
The most practical problem is the mount in the box. A verified owner fitting it to a Daniel Defense DDM4 V7 found it placed his eye directly over the charging handle, which he describes as uncomfortable and gassy, and says he was going to return the optic over it. His fix was a single-bolt cantilever riser sloping back about an inch, which moved the sight roughly two inches rearward and, in his words, made a huge difference. Plan for a mount if this is going on an AR-15.
Then the numbers. Adjustments move in 1 MOA clicks, coarse next to the 0.25 MOA of the Primary Arms MicroPrism, which makes fine zeroing slower. One owner lists the illumination buttons as too sensitive and the micro red dot mounting footprint as a miss. Field of view is 23.3 feet at 100 yards against 37.9 feet on the 3x model. And a caution about expectations rather than quality: an owner who loves his other Vortex products found the view blurred at the edges of his intended distances, which is what a fixed-focus prism does. It is not an LPVO and it does not behave like one.
Trade-offs, plainly
- The supplied mount puts the eye box over the charging handle on an AR-15 according to a verified owner; a cantilever riser fixes it at extra cost.
- 1 MOA adjustment clicks are coarse for precise zeroing.
- Field of view is 23.3 feet at 100 yards, well under the 3x model's 37.9 feet.
- Illumination buttons are easy to knock, per one owner.
- Fixed focus means the image sharpens at a set distance, which disappoints buyers expecting LPVO behaviour.
- Stock was down to two units when we verified, so availability is volatile.
Key specifications
| Magnification | Fixed 5x |
|---|---|
| Objective | 25 mm |
| Reticle | Etched AR-BDC4, LED red illumination |
| Brightness | 12 settings, 2 night vision compatible |
| Emitter | Enclosed |
| Eye relief | 2.7 in |
| Field of view | 23.3 ft at 100 yds |
| Adjustment | 1 MOA clicks, 200 MOA total range |
| Battery | One CR2032 |
| Build | Aluminum; waterproof, shockproof, fogproof |
| Size and weight | 3.6 x 1.9 x 1.8 in, 10.8 oz |
| Mount | MRDS mounting platform, Picatinny |
On the video above: it is the retailer's own clip covering the 3x and 5x models together, not a 5x-only demonstration, so we label it that way. On awards: none is claimed for this optic, and the retailer's "Best Rated Product" tag is a store rating rather than a trophy.
Should you buy it, and what else to consider
- Buy it if an unmagnified dot leaves you guessing at 100 to 200 yards and every ounce on the rifle matters to you.
- Want finer adjustments and less weight at 3x? The Primary Arms SLx 3x MicroPrism is 7.95 ounces with 0.25 MOA clicks.
- Want 5x for less? The Primary Arms SLx 5x36 Gen III is around $340, but 18.4 ounces.
- Want the 1x end back? That is an LPVO.
- Comparing the whole category? See our best prism scope guide.
FAQ
Can the Vortex Spitfire 5x replace an LPVO?
It can if you already live at the top of your zoom range. The owner review the retailer ranks as most helpful positive describes exactly that: he ran a 1-6x LPVO with an offset red dot on a 14.5 inch AR, realised he kept the LPVO between 4x and 6x anyway, and moved to the Spitfire 5x for the weight and footprint saving. What you give up is the 1x end, so close-range work gets slower, and a small etched reticle is harder to read at distance than a big LPVO reticle. If you want both ends, keep the LPVO.
What is the problem with the mount that comes with it?
A verified owner mounting it on a Daniel Defense DDM4 V7 reports that the supplied mount places the eye box directly over the charging handle, which is uncomfortable and puts gas in your face. His fix was to remove the supplied mount and fit a single-bolt cantilever riser that sloped back about an inch, moving the sight roughly two inches rearward, which he says made a large difference. If you are putting this on an AR-15, budget for a cantilever mount and treat the included one as a starting point.
How much magnification do you lose in field of view?
A lot, and it is the honest cost of 5x in a small prism. The Spitfire 5x gives 23.3 feet of field of view at 100 yards against 37.9 feet for its own 3x sibling, so you see roughly 60 percent as much of the scene. Eye relief is 2.7 inches. That makes it a sight for shooters whose actual complaint is that an unmagnified dot leaves them guessing at 100 to 200 yards, not a general-purpose close-quarters optic.
Is the Vortex Spitfire 5x worth around $450?
It is if weight is your constraint. At 10.8 ounces it carries fixed 5x for a little over half the weight of the Primary Arms SLx 5x36, and one owner states he could not find another optic offering 5x at that quality and weight, a claim we report as his rather than as our own market survey. Against it: 1 MOA adjustment clicks are coarse for precise zeroing, the illumination buttons are easy to knock according to one owner, and stock was down to two units when we checked. Price verified August 18, 2026.
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