7.62 Precision Blog

Trijicon TA648

Optical Sights and Scopes

Generally speaking a Designated Marksman rifle is used to extend the reach of a mobile squad of soldiers. Because of this the optical sight should be rugged, allow easy targeting at various distances quickly, and give a wide field of view to allow easier spotting of enemies spread around a hostile area.

The classic example of DMR scope that fits the above description is the 4x24 mm Russian PSO-1. This scope has a quick-release mount and illuminated reticle.

PSO-1 scope by Belomo

Modern Use

Elcan Spectre Dual Role scope

Elcan Spectre DR Dual Role


  4x / 1x  

  Field of View (FOV) @ 100yds, ft  


  Field of View (FOV), degrees  


  Exit Pupil, mm  


  Entrance Pupil, mm  


  Eye Relief, mm  


  CQB Offset  

  <44mm @ 60m  

  Illumination Source  

  Battery-powered LED  

  Crosshair Illumination  

  5 settings, AN/PVS-22 compatible  

  Red Dot Illumination  

  5 settings, AN/PVS-22 compatible  

  Aiming Dot Diameter  

  1.5 MOA—6 MOA  


  Dual-thickness range finding crosshair with user- selectable red dot

  Fixed Focus Range, m  

  20 to Infinity  

  Battery Type  

  DL 1/3N (3v Lithium)  

  Battery Life  

  600 hours minimum, 3000 hours average  

  Ballistic Correction  

  100—600m for 5.56 carbine 
700—1000m for 5.56mm LMG  

  Adjustment Resolution  

  0.5 minute of angle  

  Adjustment Range  

  120 minutes of angle  

  Base Mount  

  MIL-STD-1913 Picatinny Rail (Weaver compatible)  


  ARMS Levers  


  66 ft for 2 hours  


  450 g’s  

  Dimensions (L x W x H), in  

  6” x 2.9” x 3”  

  Weight, oz  

  22.3  (1.4 lbs)

IOR optic

IOR 2.5-10x42 optic.

Trijicon TA648

Trijicon ACOG TA648 6x48 mm

Magnification 6x
Objective Size (mm) 48
Bullet Drop Compensator Yes
Length (in) 9
Weight (oz) 36.9
Illumination Source Fiber Optics & Tritium
Reticle Pattern Chevron w/ Target Reference System
Day Reticle Color Red
Night Reticle Color Red
Calibration 0.308
Bindon Aiming Concept Yes
Eye Relief (in) 2.7
Exit Pupil (mm) 8
Field of View (Degrees) 3.3
Field of View @ 100 yards (ft) 17
Adjustment @ 100 yards (clicks/in) 4
Mount TA75
Mount Comes With TA75
Housing Material Forged 7075 Aluminum