The Trijicon ACOG ® /RMR ® combo is the ultimate aiming solution for both Close Quarter Battle (CQB) situations and longer distance shots requiring additional magnification. This dual-sighting system gives the shooter a distinct tactical advantage with the option of the Trijicon ACOG and the RMR Type 2 Sight.

The Trijicon TA31RCO-M4 ACOG 4x32 USMC M4 Rifle Scope w/ TA51 Mount provides the shooter with quick target acquisition at close combat ranges while providing enhanced target identification and hit probability out to 800 meters utilizing the bullet drop compensator.

ACOG 有一种被称为 BAC（Bindon Aiming Concept）的自动变倍功能，即当武器在快速运动过程中，瞄准镜的倍率是1倍，当武器停止运动或缓慢运动时，则瞄准镜自动恢复到原有的放大倍数。以TA31为例，就是说静止或慢移时是4倍，当射手本身快速移动或快速转向瞄准方向 ...

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 Trijicon ACOG RMR combo for sale is a dual sighting system that combines the long-distance capability of a magnified Advanced Combat Optical Gunsight with the close-quarters target …

先进战斗光学瞄准镜（英语：Advanced Combat Optical Gunsight，简称：ACOG）是一种由Trijicon公司研制及生产的光学瞄准镜系统。 ACOG光学瞄准镜装置在设计上是用在M16系列步枪，但Trijicon公司制造的ACOG配件也可协助安装于其他的武器。

The Trijicon 4x32 3.25 MOA ACOG ECOS Rifle Scope/Red Dot RMR is prepared to handle harsh outdoor conditions as it is waterproof up to 11m. A forged aluminum housing ensures this optic can handle rigorous missions without limiting your mobility.

The Trijicon ACOG, or advanced combat optical gunsight, combines precise distance with close-quarters speed; whereas, the Trijicon RMR, or ruggedized miniature reflex, is a versatile sight for any lighting conditions.

Forged 7075-T6 aircraft aluminum-housing provides for a nearly indestructible sighting system. Less moving parts than a variable optic equals increased durability and reliability. Seven magnification levels are available. Dry-nitrogen filled to eliminate fogging. Five times more waterproof than military standard requirements.

Housed in a 7075-T6 aircraft aluminum-alloy casing, this optic is engineered for efficient target acquisition and identification. The scope's Bullet Drop Compensator, calibrated for the 5.56mm round, aids in target engagement at distances up to 800 meters.