Monstrum Tactical 3-9×32 AO Rifle Scope

At first glance, one might think the Monstrum Tactical 3-9×32 AO Rifle Scope is one giant dial with all the adjustment rings it has. These dials and rings do not limit the performance of the scope but do you a variety of options when it comes to magnification, illumination, and range estimation.

Due to its variation, the AO has uses in hunting and tactical situations. It’s not your average long barrelled scope like the ones you might find on Leupold’s market.


One of the neat aspects about the AO is that its target reticle can be illuminated five different ways to help you see better in low light. This portion of the scope does require a CR2 battery however, which can be annoying to replace whenever it’s depleted. Unless you are using the scope every day, the battery should last you a long time.

Perhaps the most notable feature of this 3-9×32 scope is its adjustable objective lens (AO) which is promptly named for. This focus allows for increased sharpness in imagery and range estimation. The ring at the very end of the scope can also be used for focusing.

  • Some people prefer to carry a rangefinder which may give a more accurate representation of range, but it’s your preference.

This scope might be preferable for the extreme marksmen who is looking for a parallax free scope. The AO on this scope allows for adjusting that should eliminate parallax in most cases.


As we all know, a bullet begins to drop away as soon as it leaves the barrel. Beyond three-hundred yards, that drop is going to increase dramatically. Now that aspect has more to do with the ballistics and the rifle itself, but this scope can still help you get on target. With a 3-9x magnification and adjustments to the other dials, you can still be on track (while accounting for your ballistics weight and drop).

When zeroing in your rifle (preferably before you introduce it to hunting and competitions), it is especially important with this scope, in particular, to practice with different magnification and focus levels. This will help you understand your target when conditions and terrain aren’t ideal compared to a shooting range.


  • Materials: 6061 Aircraft Grade Aluminum
  • Compatibility: Rifles with Picatinny or Weaver Rails.
  • Scope Range: Close to Mid Range, 300+ Yards.
  • Magnification: 3-9
  • Objective Diameter: 32 mm
  • Eye Relief: 3.5-3.8 in
  • Weight: 1 lb
  • Length: 9.3 in


We may have described this scope as perfect for extreme marksmen, but its various features make it very user and beginner-friendly. If you intend to brave it against the elements, you can rest assure that its interior will remain safe. The body is nitrogen sealed to keep the inner workings and optics free of contamination.

You may find that you have little need for all the rings and dials on the scope but in the end they’ll always be there if you need them. This scope compensates for the smallest of optical aberrations and elements so one way or the other, you’ll end up hitting very tight groups.

Click here to see the price!