Monstrum G3
VS
Sightmark Citadel

VS

Monstrum G3
Experience exceptional range and accuracy with the adjustable 3-18x magnification of this high-performance tactical rifle scope, built for mid to long-distance shooting up to 1000 yards. Featuring a first focal plane MOA reticle, the etched crosshair remains proportional at all magnifications, providing clear, reliable ranging information and simplified holdover adjustments. Constructed from durable 6061 aircraft-grade aluminum, the scope is nitrogen-charged and weather-sealed to resist fog and harsh conditions. It includes 1/4 MOA windage and elevation adjustments with zero setting, a parallax adjustment dial for sharper focus and range estimation, and red reticle illumination with multiple brightness levels for low-light visibility. The package includes high-profile Picatinny rings, a detachable sunshade, and spring-loaded flip-up lens covers.
Sightmark Citadel
The Sightmark Citadel is built for precision, offering a first focal plane reticle that adjusts with magnification to maintain consistent subtensions for accurate ranging at any level. This feature is ideal for long-range shooting, making range estimation simple and reliable. One of the key advantages of the Citadel is its red illuminated reticle, which enhances target visibility in low light, ensuring you don’t miss your shot in challenging conditions. I found the exposed, low-profile locking turrets to be incredibly user-friendly, providing quick adjustments when needed while the locking mechanism ensures accuracy even under stress. The 30mm single-piece tube, made from aircraft-grade aluminum, gives the scope exceptional durability, withstanding recoil and ensuring precise alignment over time. Finally, the fully multi-coated optics provide superb image quality, maximizing light transmission and delivering bright, accurate visuals.
Basic Details
| Brand | Color | Style | Sport | Item Weight | Material | |
|---|---|---|---|---|---|---|
| Monstrum G3 | Monstrum | Black | Tactical | Hunting | 3.73 Pounds | Aluminum |
| Sightmark Citadel | Sightmark | Black | 3-18x50 LR2 | Hunting, Paintball, Airsoft | 26.1 Ounces | Aluminum |
Magnification & Range
| Magnification | Parallax Setting | |
|---|---|---|
| Monstrum G3 | 3-18x | 1000+ yards |
| Sightmark Citadel | 3-18x | 25 yards to infinity |
Performance Insights
| Eye Relief | Zoom Ratio | FOV | Night Vision | |
|---|---|---|---|---|
| Monstrum G3 | 4 - 4.5 in | 6:1 | 12.0 - 2.0 degrees | No |
| Sightmark Citadel | 3 Inches | 6:1 | 6.5° - 1.1° | No |
To Calculate scope clicks: Let’s check out Scope Clicks Calculator
Diameter & Tube Size
| Tube Size | Tube Diameter | Objective Diameter | |
|---|---|---|---|
| Monstrum G3 | 30mm | 30mm | 50mm |
| Sightmark Citadel | 30mm | 30mm | 50mm |
Compatibility
| Compatible Devices | Mounting Type | |
|---|---|---|
| Monstrum G3 | Rifle | Picatinny Mount |
| Sightmark Citadel | Rifle | Picatinny Mount |
Additional Features
| Reticle | Max Elevation Adjustment | |
|---|---|---|
| Monstrum G3 | Illuminated Custom Type-H | 60-80 MOA |
| Sightmark Citadel | Mil-Dot | 60 MOA |
Built for Tough Conditions
| Waterproof | Fogproof | Shockproof | |
|---|---|---|---|
| Monstrum G3 | Yes | Yes | Yes |
| Sightmark Citadel | Yes | Yes | Yes |
Accessories & Warranty
| Includes | Warranty | |
|---|---|---|
| Monstrum G3 | G3 3-18x50 FFP Scope, 30mm High Profile Scope Rings, Lens Cleaning Cloth, Spring Loaded Flip-up Lens Covers, Sunshade | Full Lifetime Warranty |
| Sightmark Citadel | Sunshade, Throw lever, Lens caps, Battery, Manual | Limited Lifetime Warranty |



















