We Found U.S. Military Trijicon ACOG Scopes!!!

Introduction and Recent Marine Corps Use

The host, still serving in the Marine Corps Reserve, introduces a batch of surplus Trijicon ACOG RCO 4x32 rifle scopes and notes the timing with his recent rifle qualification. He explains that he just qualified using the same model optic, though not the exact units shown. The ACOG, also referred to as the Rifle Combat Optic (RCO), has become the standard optic in his Marine unit, replacing iron sights he originally qualified with. He describes the ACOG as a rugged, durable combat optic that initially met resistance due to change, but quickly proved its value, especially at the 500-yard line where the magnification and reticle made qualification significantly easier.

Surplus ACOG Lot and Condition Grading

A large tub of surplus Trijicon ACOG RCO 4x32 scopes is shown, with multiple layers of optics visible. The scopes are dated between approximately 2008 and 2012. The host states he spot-checked serial numbers with Trijicon and personally inspected each optic for tritium brightness and nitrogen fill, confirming they remain bright and fog-resistant. He introduces the grading system: Grade C as the most cosmetically worn, with visibly beat-up housings, and higher Grade B and Grade A units with progressively better exterior condition. Despite cosmetic wear, he emphasizes that the glass, tritium illumination, and overall function remain intact across the lot he accepted.

Reticle, Chevron Holds, and Trijicon Markings

The video details the ACOG’s optical specifications and reticle. The RCO ACOG is a fixed 4x optic with a 32 mm objective lens and a red tritium-illuminated Chevron reticle. The host explains the holdover system: at 100 yards the tip of the Chevron is used, at 200 yards the lower interior of the Chevron is used, at 300 yards the top of the post is used, and additional bullet drop compensation marks extend in increments for 400, 500, 600, and 800 yards. He notes that the tritium can be bright enough that some users cover part of the fiber optic with electrical tape for a more precise sight picture. All the surplus units offered use the Chevron reticle pattern and have held zero reliably in his experience.

Grade C and B ACOGs: Wear, Verses, and Durability

The host shows several Grade C ACOGs, pointing out cosmetic wear on the body and housing while confirming that the reticles and tritium remain serviceable. All units use the thumb-screw mount that clamps to a rail. He discusses the right-side markings: pre-2010 optics are marked “ACOG 4x32 JN 8:12,” referencing the Bible verse John 8:12. He notes that around 2010, due to controversy and political concerns, new production omitted the verse and many existing optics had the marking removed, sometimes cleanly and sometimes with rough chisel or Dremel work. Moving to Grade B units, he shows examples with cleaner housings and fiber optic “ears,” explaining that grading is largely based on external wear around the protective ears and housing, not on glass or reticle quality.

Grade A ACOGs and FN Military Collector M4 Setup

An FN Military Collector M4 with a 14.5-inch barrel pinned and welded to legal length is shown with an ACOG mounted, closely matching the host’s issued Marine Corps rifle configuration, aside from an ambidextrous safety on the civilian rifle. He then opens a small container of Grade A ACOGs, describing them as the best-looking examples in the lot. These units show minimal cosmetic wear, with clean protective ears and clear fiber optic elements. Some still retain the John 8:12 marking on the right side. The glass on these Grade A scopes appears especially clear, and all retain the Chevron reticle with bullet drop compensation out to 800 yards. The host emphasizes that the quantity of Grade A and Grade B optics is limited compared to the larger number of Grade C units.

Optical Performance, Both-Eyes-Open Use, and Range Impressions

The host notes that the ACOG is designed to be used with both eyes open, aiding rapid target acquisition by allowing the shooter to see the reticle and target simultaneously. He comments on the clarity of the lenses, particularly on the higher-grade units, describing the view as high-definition when looking through the optic. He reiterates that the scopes are dry nitrogen filled, waterproof, and resistant to fogging when breathed on or exposed to moisture. To demonstrate practical performance, he mounts an ACOG on his Colt M4-style AR-15 with a Daniel Defense rail and loads magazines to shoot on the range. He mentions that the specified eye relief is around 2 to 4 inches, though it feels shorter to him, and he adjusts his head position to achieve a full sight picture without scope shadow while engaging targets.