Aero Precision M4E1 ATLAS S-ONE 5.56 NATO AR-15, 16-inch FDE, Threaded Barrel, Swampfox Green Dot, Radian Raptor
This Aero Precision M4E1 AR-15 pairs the forged M4E1 receiver set with the lightweight ATLAS S-ONE free-float handguard, all finished in Flat Dark Earth. It features a 16-inch threaded barrel with an aftermarket three-slot flash hider (not A2) and arrives upgraded with a Radian Raptor ambidextrous charging handle, a Swampfox green dot optic, and a Magpul bipod. The rifle is in excellent condition and includes a 30-round Magpul PMAG.
The M4E1 forged receiver set integrates an enlarged trigger guard and enhanced magwell for efficient handling and reloads. It uses a threaded bolt-catch pin and provides provisions for a receiver tension screw and 4-40 takedown detent set screws. Selector pictographs are marked on the lower. Receivers and handguard wear a matching FDE finish, contrasted by a black barrel and small parts, and the rifle is made in the USA.
The ATLAS S-ONE handguard is a 6061-T6 aluminum, M-LOK free-float design with a short, front-only Picatinny section and a deleted center top rail to reduce weight. A short M-LOK Picatinny rail section is installed for accessory mounting. The free-floated system helps maintain barrel harmonics, and the 16-inch barrel is threaded and capped with an aftermarket three-slot flash hider (not A2).
Upgrades include a Swampfox green dot optic mounted on a Picatinny base and an upgraded Radian Raptor ambidextrous charging handle for confident, bilateral manipulation. A Magpul bipod is installed for supported shooting. Ergonomics are rounded out with an adjustable stock offering an approximate 10.5–13.75 inch length of pull and a Magpul MOE pistol grip.
Condition
Overall Condition: Excellent condition, showing only faint signs of any prior use or handling.
Bore Condition: Excellent - Clean, mirror finish, no signs of wear.
Bore Rifling: Excellent Rifling - Sharp lands and grooves.
Specific Condition Notes: Shows minimal handling marks consistent with careful prior use. Please refer to the photos for a complete view of finish and features.
What’s Included
- Swampfox green dot optic (installed on Picatinny mount)
- Magpul bipod (installed)
- Short M-LOK Picatinny rail section (installed on handguard)
- Radian Raptor ambidextrous charging handle (installed)
- 1x Magpul PMAG 30-round magazine for 5.56×45 (polymer)