Anderson AM-15 5.56 NATO Custom AR-15 w/ 16" Stag HP/MP Barrel & Diamondhead Quad Rail
This Anderson Manufacturing AM-15 stands out as a thoughtfully assembled AR-15 platform rifle built around a forged 7075-T6 receiver set and upgraded with quality U.S. components. A Stag Arms 16" 1:7 twist HP/MP-inspected barrel, Diamondhead USA free-float quad rail, and Rogers Super-Stoc bring together reliability, modularity, and improved handling in a lightweight, slick-side package.
Condition
Overall Condition: Very good condition, showing only light, superficial signs of prior handling or use.
Bore Condition: Excellent - Clean, mirror finish, no signs of wear.
Bore Rifling: Excellent Rifling - Sharp lands and grooves.
Specific Condition Notes: Light surface scratches are visible on close inspection, but finish integrity remains strong with no deep marks or corrosion.
What’s Included
- Anderson Manufacturing AM-15 semi-automatic rifle
- One 30-round aluminum USGI-pattern STANAG magazine
The heart of this build is the Stag Arms 16" government-profile barrel made from 4150 CMV steel. It is high-pressure and magnetic-particle tested for durability, sports a 1:7" right-hand twist ideal for a wide bullet weight range, and arrives threaded 1/2x28 for standard muzzle devices.
A Diamondhead USA free-float quad-rail handguard in 6061-T6 aluminum surrounds the carbine-length gas system, providing four full-length Picatinny rails while eliminating barrel contact for enhanced accuracy potential. The upper receiver features a continuous numbered top rail and a slick-side design that omits the forward assist for reduced weight and a clean profile.
The lower receiver is multi-caliber marked and fitted with a Rogers Super-Stoc six-position collapsible stock equipped with a cam-lock and a Wilson Combat butt-plate. Combined with the A2-pattern pistol grip, the setup offers a 10.75" length of pull and solid shoulder contact.
Internally, the rifle operates on a direct-impingement system standard to the AR-15 family. The 30+1 round capacity, modular rail layout, and hard-coat anodized matte black finish round out a versatile, range-ready semi-automatic carbine built entirely in the United States.