The Trijicon ACOG is a legendary optic among many servicemen who have relied upon its durability and versatility during combat.  While I am lucky to count myself among that group, my time spent overseas was spent with the venerable TA01 which has been surpassed time and time again by more advanced offerings from Trijicon.  While researching optics I came across what seems to be a unique collaboration: a Trijicon ACOG using a non-Trijicon reticle.  In this case, it’s the ACSS reticle from Primary Arms.  While I can only speculate as to why Trijicon opened up its flagship optic to using a non-OEM reticle, this seems to be a one-of-a-kind partnership.

Given that we’re essentially looking at two products here, I want to cover some of the basics on each before diving into how they work as a whole.

Trijicon and Primary Arms collaboration | The ACOG with ACSS reticle

First, the ACOG.  The Advanced Combat Optical Gunsite is a compact, fixed power scope of the “prismatic” design variety.  Rather than using a series of lenses (and a long tube), a prismatic scope uses a glass prism to focus the image.  The result is a much more compact scope, though one with a generally shorter eye relief (1.5″ here).  There are a variety of ACOG models with varying reticles, magnification and even power sources.  The specific model shown here is the TA31-R-ACSS.  It has 4x magnification in the aluminum alloy body, with the reticle being illuminated both by (mildly) radioactive tritium as well as a fiber optic cable.  This ACOG is much shorter than traditional scopes and weighs in at 9.9 ounces.  Water-proof, shock-proof and damn near Ranger-proof, the ACOG is the king of the hill regarding short-to-mid-range combat optics.

This article is courtesy of The Loadout Room.