Vortex Crossfire II 3 9×40 Review: Should You Add It to Your Rifle?

If you need a scope that will cover every range, you want to consider the Vortex Crossfire II 3 9×40 to add to your rifle. Vortex Optics is a reliable manufacturer that creates quality products and could enhance your shooting experience. But is this accessory the right scope to take out into the field this season?

It’s helpful to know that three to nine represents the range of magnification, and 40 is the size of the objective. This is the area that gathers light at the front of the scope. Although you can buy a scope with a bigger objective, it can add weight or affect the ability to securely mount on an AR-15 rifle. Choose from three reticles, including a standard V-Plex, Dead-Hold BDC, and V-Bright types.

The Pros & Cons

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  • Choose it if you need a rugged scope. The Vortex Crossfire II 3 9×40 is durable and constructed for rugged, shock-proof use.
  • Buy clarity. It allows you to see targets well. The optics quality of the Vortex Crossfire II 3 9×40 is excellent. Clarity of scope is an important factor.
  • Consider your natural minimum eye relief range. The minimum eye relief is within the natural range. Minimum eye relief answers how far away from your eye must be to see clearly through the scope. The 9×40 minimum eye relief at 3x magnification is about 3.8 inches.
  • Know the importance of full multi-coating vs. other optics variables. The optics are fully multi-coated to ensure comfortable viewing in light and darkness. It’s designed to allow maximum transmission of light and desirable brightness.
  • Prevent fogging in weather or high humidity conditions. This scope is sealed to prevent objective fogging. Fog proofing is often referred to as nitrogen-purging as well.
  • Use in light and darkness. Lets plenty of light in for shooting in dim light at dusk.
  • Caps on the turrets come off easily. Just rotate caps a couple of times. The Vortex Crossfire II 3 9×40 caps are made of aluminum so you can grasp them really well.
  • Note the Vortex VIP Warranty. Vortex’s unlimited lifetime warranty is also transferable.


  • Get accustomed to the focus rings. The focus rings of the Vortex Crossfire II 3 9×40 need a little more pressure than competitive models, such as the Nikon Buckmaster II to rotate.
  • Buy what you need. You might not need the Dead-Hold BDC version if you always zero the rifle to its maximum point blank range (MPBR) of load/cartridge used.
  • Don’t over adjust. The Vortex Crossfire II 3 9×40 windage and elevation adjusters are designed with fingertip elevation and windage knobs.
  • Know your MOA preferences. The Vortex Crossfire II 3 9×40 range of adjustment maximum is 60 MOA for both elevation and windage. Competitors like the Nikon Buckmaster II offer adjustment maximums of 80 MOA or more.

Who Is This Product Best For?

Shooters and hunters benefit most from the Vortex Crossfire II 3 9×40 line of riflescopes. Use with AR-15 rifles. These scopes are great for hunting at medium to long-range (up to about 425 yards) or up close when necessary. Dial back to three times magnification to shoot at 7 yards or so.

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Vortex Crossfire II: Conclusion

Vortex Crossfire II 3 9×40

Owners of the Vortex Crossfire II 3 9×40 say the elevation and windage adjustments offer greater accuracy than the user might expect for a riflescope in the price range. All in, the Vortex Crossfire II 3 9×40 represents good value and performance to use on an extended or important hunting trip.

The 3-9×40 Crossfire II riflescope is one of many configurations in the Crossfire II line. The Dead-Hold BDC reticle is good for hunting/shooting at varying ranges where estimating holdover is a concern.

With long eye relief and an ultra-forgiving eye box, you’ll be able to quickly get a sight picture and acquire your target. The fast focus eyepiece allows quick and easy reticle focusing.

Anti-reflective, fully multi-coated lenses provide bright and clear views for the user.

Capped reset turrets are finger adjustable with MOA clicks that can be reset to zero after sighting in.

A single-piece tube constructed from aircraft-grade aluminum ensures strength and shockproof performance. O-ring sealed and nitrogen purged, the Crossfire II delivers waterproof and fog-proof performance.