The TA31RCO is an Advanced Combat Optical Gunsight (ACOG) designed for the M4 and M4A1 weapon system (14.5" barrel). It incorporates dual illumination technology using a combination of fiber optics and self-luminous tritium. This allows the aiming point to always be illuminated without the use of batteries. The tritium illuminates the aiming point in total darkness, and the fiber optic self-adjusts reticle brightness during daylight according to ambient light conditions. This allows the operator to keep both eyes open while engaging targets and maintaining maximum situational awareness.
Designed to the exact specifications of the United States Marine Corps, the unique reticle pattern provides quick target acquisition at close combat ranges while providing enhanced target identification and hit probability out to 800 meters utilizing the Bullet Drop Compensator.
No tools are needed for windage and elevation adjustments because the TA31RCO features external adjusters, making it waterproof up to 11m without the caps. Mounting bosses are integrated into the housing by the eyepiece to allow the easy addition of a Trijicon RMR® (not included).
The TA31RCO-M4CP also includes:
1 BOBRO Quick Release Mount ACOG Mount
1 killFLASH® Anti-Reflection Device (TA91)
1 Scopecoat (TA96)
1 LENSPEN® (TA56)
1 Lanyard Assembly for Adjuster Caps (TA71E)
1 Trijicon Logo Sticker (PR15)
1 RCO Manual
1 Warranty Card
|Objective Size (mm)||32|
|Bullet Drop Compensator||Yes|
|Length (in)||6.7 oz.
|Weight (oz)||15.8 oz.
(with mount and ARD)
|Illumination Source||Fiber Optics & Tritium|
|Reticle Pattern||Chevron w/ Target Reference System|
|Day Reticle Color||Red|
|Night Reticle Color||Red|
|Calibration||0.223 (14.5 in. barrel)|
|Bindon Aiming Concept||Yes|
|Eye Relief (in)||1.5|
|Exit Pupil (mm)||8|
|Field of View (Degrees)||7|
|Field of View @ 100 yards (ft)||36.8|
|Adjustment @ 100 yards (clicks/in)||2|
|Mount Comes With||Flattop Thumbscrew Mount (TA51)|
|Housing Material||Forged Aluminum|
The ACOG mount utilizes a single Patented [US Patent 8,567,105] BLAC™ lever system and the mounting channel is to Trijicon factory dimensions. Height of mount is also to Trijicon factory dimensions. We were supplied critical dimensions directly from Trijicon, so it is completely within the manufacturers specifications, and will work with the ACOG properly. It is constructed from Aluminum alloy 6061-T6 and hard anodized to Mil-Spec. It is 3.5 inches long with 2 mounting fastener allocations. It can be configured for left/right lever placement. It utilizes a single BOBRO mechanical index and uses the factory supplied fastener for attachment to the mount body. It features the patent pending BLAC™lever system which requires no manual adjustment to attain a proper, rock solid engagement on a 1913 Picatinny rail.
The ACOG mount features the Patented [US Patent 8,567,105] BLAC™ lever system which was designed around the following parameters:
The ACOG mount is precision CNC machined from a block of 6061 T6 aluminum and finished in hard coat type 3 mil-spec anodized black for a rock hard lasting finish.
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