3-9x40 Tactical Rifle Scope - Mil-Dot Reticle

Rifle Scopes

$ 69.95


$ 69.95

The Monstrum S3940-M-RG Rifle Scope is a compact, tactical scope, designed for close to mid range shooting, with high optical clarity at between 3 to 9 times magnification and a 40mm objective diameter.

It features a clean yet functionally designed illuminated mil-dot reticle, allowing for on-the-fly range estimation and long distance targeting. The reticle illuminates in red or green and in multiple brightness intensities, for a suitable sight picture regardless of lighting or environment.

The scope has an integrated mount that secures quickly to any Picatinny or Weaver rail equipped flat top rifle. Fashioned from aircraft grade aluminum, the scope is compact and lightweight, yet with a sturdy, weatherproof design. It is 8.5 inches in length, 2.5 inches in width, 2.5 in height, and 1 pound in weight.

It has a Field of View at 100 yards of 37.5ft - 12.4ft (3x-9x), an eye relief of 3 inches, an exit pupil of 13.3mm - 4.4mm (3x-9x), and a click value of 1/4 MOA.

It comes with lens covers and one 3V CR2032 battery.

  • 3-9x magnification with a 40mm objective lens.
  • Glass mil-dot reticle for on-the-fly range estimation and long distance targeting.
  • Reticle visible in black or illuminated in red or green for visilbity at night or in low light evironments.
  • Integrated rail mount fastens securely to any flat top Picatinny rail equipped rifle.
  • All Monstrum Tactical Rifle Scope products are backed by a one year warranty.

 Download the S3940-M-RG Manual 

Returns Policy

The Monstrum Tactical 30 Day Satisfaction Guarantee

Monstrum Tactical stands behind each of our products with a 30-day no questions asked return policy. Return items must be returned in unused condition with all original parts and packaging. For return items, the buyer is responsible for return shipping. To ensure fast and accurate return processing, all returns must first be authorized via email.

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