Anderson AM-15 5.56 NATO Semi-Auto Rifle, 20 inch Heavy Barrel, Free-Float M-LOK Handguard, Flat-Top Upper, Red Dot Sight
This Anderson AM-15 pairs a 20 inch heavy 5.56 NATO barrel with a long, free-float M-LOK-style handguard and a flat-top upper featuring a continuous 1913 Picatinny rail. A non-magnified reflex red dot sight is installed on the top rail, and the rifle includes a collapsible 6-position stock. It is a straightforward, feature-rich AR-15 configuration built in the United States.
Condition
Overall Condition: Good condition, showing some signs of prior use and handling.
Bore Overall Condition: Good - Clean, well-maintained, minor wear marks.
Bore Rifling: Excellent Rifling - Sharp lands and grooves.
Specific Condition Notes: The rifle shows minor, superficial scratches and blemishes. There are large scuff marks on the barrel. Light surface rust is present on the castle nut.
What's Included
- Reflex red-dot sight (1x, red reticle), installed on the top rail
- 1x 30-round USGI-pattern metal STANAG magazine
The 20 inch barrel is marked "5.56 NATO" and uses a 1:9 twist to pair with a range of commonly available projectiles. It is a heavy-profile barrel with a plain muzzle and no device installed.
The flat-top upper provides a continuous 1913 Picatinny rail and an ejection port cover. A long, free-float aluminum handguard extends forward with M-LOK-style slots and a full-length top rail, giving ample mounting space. The included red dot sight is mounted on the top rail and ready to use.
The lower receiver is marked "AM-15" and "MULTI CAL," with selector markings for SAFE/FIRE. Controls include a manual safety. The rifle runs a semi-automatic, direct-impingement action on the AR-15 platform and is finished in matte black.
Furniture consists of a collapsible 6-position polymer stock with an approximately 9.75–13 inch length of pull, along with an A2-style polymer pistol grip. Capacity is 30+1 with the included USGI-pattern magazine.
Made in the United States, this AM-15 brings together a heavy 20 inch barrel, free-float handguard, and an installed red dot sight for a clean, practical configuration.




