Make: Armalite
Model: AR-10A2
Serial Number: US 51186
Year of Manufacture: Circa, mid 1990s
Caliber: 7.62x51 NATO / .308 Win
Action Type: Semi-Automatic, Direct Impingement Fed By Detachable Mags.
Markings: The left side of the receiver is marked “ARMALITE / RIFLE 7.62MM / AR-10A2 / US 51186 / ARMALITE INC. / GENESEO, IL / SAFE FIRE”. The right side of the receiver is marked “SAFE FIRE”. There is an eagle logo on the front of the magwell.
Barrel Length: 20” 21.5” with the three chamber muzzle brake.
Sights / Optics: The front sight is an A2-style fixed front sight base with an adjustable post set between protective wings. The rear sight is a fixed A2-style carry handle with a two position peep sight adjustable for windage and elevation.
Stock Configuration & Condition: This rifle sports a three piece A2 stock set. There are light handling marks throughout. There are no chips or cracks. The length of pull is 14.25” from the front of the trigger to the back of the buttpad. Overall the furniture is in about Very Good to Excellent condition.
Magazine Quantity & Condition: This rifle includes one Armalite 20 round AR10 magazine in Very Good overall condition.
Type of Finish: Anodized
Finish Originality: Original
Bore Condition: The bore is bright and the rifling is sharp. There is no erosion in the bore, but there is some moderate stubborn fouling. In this writer’s opinion the bore rates 9/10.
Overall Condition: This rifle retains about 95% of its metal finish. There are light handling marks throughout. The action has light wear from use. The screw heads are sharp, and the pins undamaged. The markings are clear. Overall this rifle is in about Very Good condition.
Mechanics: The action function correctly. We did not fire this rifle. As with all used firearms, a thorough cleaning may be necessary to meet your maintenance requirements.
Box, Paperwork & Accessories: This rifle includes one magazine.
Our Assessment: This Armalite AR-10A2, chambered in 7.62x51mm NATO / .308 Winchester, is a modernized version of the iconic AR-10 battle rifle, maintaining the classic fixed carry handle A2-style design while offering reliability, accuracy, and the rugged construction expected from an Armalite rifle. Manufactured in the 1990s, this rifle represents a faithful semi-automatic adaptation of the original AR-10 design, which served as the foundation for Eugene Stoner’s revolutionary AR-series rifles. Featuring a 20-inch barrel (21.5 inches with the muzzle brake) and a direct impingement gas system, this AR-10A2 is built for long-range precision, durability, and adaptability, making it an excellent choice for military surplus collectors, competitive shooters, and modern rifle enthusiasts alike. One of the defining features of this AR-10A2 is its fixed carry handle upper receiver with an integrated A2-style rear sight, providing a classic appearance and robust sighting system for those who prefer iron sights over optics. The three-piece A2 stock set, including the fixed buttstock, rifle-length handguards, and ergonomic pistol grip, ensures stability and control, making it a well-balanced platform for both precision shooting and practical use. The rifle remains in very good condition, with 95% of its original finish intact, showing only light handling marks and minor wear from normal use. The bright bore with sharp rifling ensures that this rifle remains a capable and accurate shooter, with only minor fouling that can be easily addressed with proper cleaning.
For collectors, marksmen, and those who appreciate the AR-10’s legacy, this Armalite AR-10A2 is an exceptional find. It offers the classic look and feel of an A2-style battle rifle while delivering the hard-hitting performance of the .308 Winchester/7.62 NATO cartridge. Whether used as a long-range precision rifle, a Cold War-era collector’s piece, or a reliable semi-auto for field use, this AR-10A2 embodies the strength, history, and performance that made the original AR-10 a legend among military rifles.