Anderson AM-15 5.56 NATO Semi-Auto AR-15 Rifle, 16 in Barrel, Free-Float M-LOK, SIG ROMEO-MSR, B5 Stock
This Anderson AM-15 stands out as a well-configured AR-15 platform rifle in 5.56 NATO with thoughtful upgrades installed. It features a free-float aluminum M-LOK handguard, a 16-inch threaded barrel with a ported muzzle brake/compensator, and a B5 Systems adjustable stock. A SIG Sauer ROMEO-MSR red-dot optic is mounted and ready to use. Overall condition is very good with an excellent, mirror-bright bore.
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: The firearm presents in great shape. Minor, superficial scratches and blemishes are present. The bore is clean and shiny.
What’s Included
- Optic: SIG Sauer ROMEO-MSR red-dot sight on riser mount with flip-up caps (installed)
- Foregrip: Magpul MVG vertical grip (installed)
- Accessory Rail: M-LOK 1913 Picatinny rail section at 6 o'clock (installed)
- Stock: B5 Systems adjustable carbine stock (installed)
- Grip: Magpul MOE pistol grip (installed)
- Muzzle Device: Ported muzzle brake/compensator (installed)
- Magazine: 1x 30-round polymer AR-15/STANAG pattern magazine
The AM-15 combines an aluminum alloy receiver set in matte black with a flat-top upper that includes a Picatinny rail, forward assist, case deflector, and ejection-port cover. Its free-float aluminum M-LOK handguard provides modern accessory mounting, with a short 12 o'clock rail at the front and an added 6 o'clock 1913 section. A low-profile gas block resides under the handguard.
The 16-inch barrel is threaded and fitted with a ported cylindrical muzzle brake/compensator to help manage muzzle movement. The rifle uses a semi-automatic, direct-impingement action with right-side ejection. The lower is marked "MULTI CAL."
Ergonomics are enhanced with a B5 Systems adjustable carbine stock featuring an integral QD socket. Length of pull is approximately 11 inches to 14.5 inches. A Magpul MOE pistol grip and Magpul MVG vertical foregrip round out the user interface.
A SIG Sauer ROMEO-MSR red dot is installed on a riser with flip-up caps for fast sight acquisition. The rifle uses the AR-15/STANAG detachable magazine interface and has a stated capacity of 30+1, and one 30-round polymer magazine is included. This rifle is made in the United States and finished in matte black.

