Aero Precision M4E1 .300 BLK SBR, 8-inch Barrel, FDE, AR-15 Platform, ATLAS R-ONE M-LOK, Left-Side Safety
This Aero Precision M4E1 short-barreled rifle is a compact .300 AAC Blackout build with an 8-inch barrel, uniform FDE receivers and handguard, and left-side safety. It features the Aero ATLAS R-ONE free-float M-LOK handguard, a threaded muzzle with an A2-style birdcage flash hider, and an ejection-port cover marked "300 BLK." The receivers are 7075-T6 aluminum with an integral trigger guard and a flared magwell.
Condition
Overall Condition: Very good condition, showing only light, superficial signs of prior handling or use.
Bore Overall Condition: Excellent - Clean, mirror finish, no signs of wear.
Bore Rifling: Excellent Rifling - Sharp lands and grooves.
Specific Condition Notes: The brass deflector shows heavy finish wear. Otherwise, the rifle presents in great shape.
What’s Included
- Aero Precision M4E1 .300 BLK short-barreled rifle (8-inch barrel, FDE)
- 1 Magpul PMAG Gen M3 30-round polymer magazine (body marked 5.56x45)
The heart of this rifle is Aero Precision’s M4E1 platform in .300 AAC Blackout with an 8-inch barrel and a low-profile gas block. The upper includes a forward assist and brass deflector, and the ejection-port cover is clearly marked "300 BLK" for easy caliber identification.
The ATLAS R-ONE free-float M-LOK handguard uses Aero’s ATLAS clamping system and has a full-length 12 o’clock Picatinny rail along the entire handguard. It pairs with Aero’s receivers for consistent fit and finish, including matching FDE anodizing on the receivers and handguard with a black barrel and muzzle device.
Controls are streamlined and modern: a left-side safety selector and an ambidextrous charging handle with extended latches, plus a standard magazine release. The lower features an integral trigger guard and a flared magwell for easier magazine changes.
The rifle is configured with a collapsible, adjustable FDE polymer stock and a Magpul polymer pistol grip. The threaded muzzle is fitted with an A2-style birdcage flash hider. No sights or optics are installed.