Free Shipping & Free Returns*

FREE SHIPPING on Over 250,000 Products

Enjoy free shipping during the holidays! Shop now and get Free Value Shipping on most orders over $49 to the contiguous 48 states, DC and to all U.S. Military APO/FPO/DPO addresses.

Enjoy Our Extended FREE RETURNS

We want to ensure that making a return is as easy as possible! With our Hassle-Free, Extended Holiday Returns, eligible orders placed from November 12, 2025 on will benefit from an extended return deadline (January 13, 2026 or 30 days after receipt of your order - whichever is later). We'll even cover the cost of return shipping. Learn more about our Return Policy.

Shopping Cart
Special offer available for this product. Click here to see!
Limited Time Offer. Click here to see!
Government Export Restriction Government Export Restriction
Questions & Answers
Reticle: Crosshair Tube Diameter: 1 inReticle Focal Plane: Second Focal Plane (SFP) Illumination Color: Green , Red Color: Black Weight: 15 ozAdjustment Click Value: 1/4 MOAAdjustment Type: MOA Parallax: Adjustable

Code: MON-RS-MG3RS4-SG61850-AO-B

MPN: SG61850-AO-B

UPC: 810088812040

$109.95

Buy Together and Save

Receive $2.20 OP Bucks

Product Info for Monstrum Guardian 6-18x50mm 1in Tube Second Focal Plane w/ Parallax Adjustment AO Rifle Scope

Built to be the ideal rifle scope, the Monstrum Guardian 6-18x50mm 1in Tube Second Focal Plane w/ Parallax Adjustment AO Rifle Scope is perfect for scenarios in which a high quality riflescope is the key to achieving success. These Rifle Scopes from the optical experts at Monstrum are formulated utilizing the robust and long lasting materials that you've come to count on out of this amazing company. Monstrum has developed in the weapon scope business for a number of years, and the Monstrum Guardian 6-18x50mm 1in Tube Second Focal Plane w/ Parallax Adjustment AO Rifle Scope is definitely the outcome of their determined initiatives to make certain that you will have a heavy duty and efficient scope on your gun. One of our main goals at OpticsPlanet is to make sure you depart with the very best rifle scope for your necessities, and the Monstrum Guardian 6-18x50mm 1in Tube Second Focal Plane w/ Parallax Adjustment AO Rifle Scope is among the many scopes that we are thrilled to highlight. If you are browsing for the perfect riflescope to satisfy your shooting demands, then select the Monstrum Guardian 6-18x50mm 1in Tube Second Focal Plane w/ Parallax Adjustment AO Rifle Scope.image

Specifications for Monstrum Guardian 6-18x50mm 1in Tube Second Focal Plane w/ Parallax Adjustment AO Rifle Scope:

Manufacturer: Monstrum
Objective Lens Diameter: 50 mm
Magnification: 6 - 18 x
Reticle: Crosshair
Tube Diameter: 1 in
Reticle Focal Plane: Second Focal Plane (SFP)
Illumination Color: Red, Green
Field of View, Linear: 15.2 - 5.2 ft at 100 yds
Eye Relief: 3.5 - 3.8 in
Color: Black
Weight: 15 oz
Adjustment Click Value: 1/4 MOA
Adjustment Type: MOA
Parallax: Adjustable
Fabric/Material: 6061 Aircraft Aluminum
Water Resistance Level: Yes
Fogproof: Yes
Gun Type: Rifle

Features of Monstrum Guardian 6-18x50mm 1in Tube Second Focal Plane w/ Parallax Adjustment AO Rifle Scope

  • Adjustable 6-18 times magnification, for targeting out to 1000 yards and beyond
  • An adjustable objective lens or AO - that allows for sharper focus of the target image, elimination of parallax, and range estimation
  • Precision 1/4 MOA/click windage and elevation adjustments with locking turrets

Package Contents:

  • Monstrum Guardian 6-18x50mm 1in Tube Second Focal Plane w/ Parallax Adjustment AO Rifle Scope

Monstrum Guardian 6-18x50mm 1in Tube Second Focal Plane w/ Parallax Adjustment AO Rifle Scope Orderable Models

List of Orderable Models

  • Monstrum Guardian 6-18x50mm w/ Parallax Adjustment AO Rifle Scope, 1in Tube, Second Focal Plane, Black, SG61850-AO-B , MPN: SG61850-AO-B , UPC: 810088812040 , Code: MON-RS-MG3RS4-SG61850-AO-B
Compare (0)