Aero Precision M4E1 ATLAS R-ONE 5.56 NATO, 16 in, AR-15 Platform, Free-Float M-LOK, Two-Tone, Custom Upgrades
This Aero Precision M4E1 AR-15 pairs forged 7075-T6 receivers with the lightweight ATLAS R-ONE free-float M-LOK handguard and a 16-inch threaded barrel. It features a two-tone finish (earth-tone/bronze lower, black upper), direct-impingement operation, and thoughtful upgrades including a Magpul B.A.D. Lever, a Picatinny rail-mounted angled foregrip on an M-LOK 1913 section, flip-up polymer BUIS, and a multi-port brake. It comes made in the USA and includes two Lancer L5AWM 30-round magazines, one 30-round Magpul PMAG GEN M3, one 10-round Magpul PMAG, and a Bulldog soft rifle case.
Condition
Overall Condition: Good condition, showing some signs of prior use and handling.
Bore Condition: Good - Clean, well-maintained, minor wear marks.
Bore Rifling: Excellent Rifling - Sharp lands and grooves.
Specific Condition Notes: The bore is clean with lands and grooves showing little wear. The BCG chamber shows minimal wear and usage.
What’s Included
- Bulldog soft rifle case
- 2x 30-round Lancer L5AWM translucent magazines
- 1x 30-round Magpul PMAG GEN M3 polymer magazine
- 1x 10-round Magpul PMAG polymer magazine
- Flip-up polymer backup iron sights (installed)
- Picatinny rail-mounted angled foregrip on M-LOK 1913 rail section (installed)
- M-LOK rail cover panel set (installed)
- Magpul B.A.D. Lever bolt-catch extension (installed)
- Multi-port muzzle brake/compensator (installed)
The heart of this build is Aero Precision’s M4E1 forged 7075-T6 lower receiver with integrated trigger guard, a flared magwell, threaded bolt-catch pin provision, and dual 90°/45° selector markings. It is paired with a matched M4E1 flattop upper that includes a forward assist and ejection port cover. The rifle wears a two-tone finish with an earth-tone/bronze lower and black upper.
The ATLAS R-ONE free-float M-LOK handguard is machined from 6061-T6 aluminum and uses Aero’s ATLAS attachment system. It is laser-marked and features a full-length top Picatinny rail for mounting sights and accessories along the handguard.
This 5.56mm NATO rifle runs a semi-automatic, direct-impingement gas system and uses a 16-inch threaded barrel capped with a multi-port brake/compensator. It accepts STANAG-pattern magazines and has a capacity of 30+1.
The furniture includes an adjustable polymer stock with an approximate length of pull of 10.5–14 inches and a textured AR-pattern pistol grip. Installed enhancements include a Magpul B.A.D. Lever for bolt-catch extension, a Picatinny rail-mounted angled foregrip on an M-LOK 1913 section, rail cover panels, and flip-up polymer BUIS in FDE/tan. Made in the USA.