Aero Precision M4E1 .300 BLK AR-15 Pistol, 14.5 in — Custom Two-Tone with MAS Defense Gold TiN BCG, ATLAS R-ONE, SB Tactical Brace
This custom .300 AAC Blackout AR pistol is built on Aero Precision's M4E1 forged receiver set and finished in a two-tone bronze/brown and OD green scheme. It features a MAS Defense gold TiN bolt carrier group, an Aero ATLAS R-ONE free-float M-LOK handguard with a Picatinny top rail, and ambidextrous controls. A blast-forwarding linear compensator, SB Tactical adjustable arm brace, and DFCO furniture complete a configuration that is both refined and functional.
Condition
Overall Condition: Excellent condition, showing only faint signs of any prior use or handling.
Bore Overall Condition: Excellent - Clean, mirror finish, no signs of wear.
Bore Rifling: Excellent Rifling - Sharp lands and grooves.
This example shows minimal prior use.
What's Included
- Soft rifle bag
- 1x 20-round Magpul PMAG AR/M4 GEN M3 polymer magazine
- DFCO M-LOK hand stop (installed)
The heart of this build is the Aero Precision M4E1 forged receiver set with an integral trigger guard and the Aero "A" logo on the magwell. Chambered in .300 AAC Blackout, it uses a semi-automatic direct-impingement system and a 14.5-inch barrel capped with a blast-forwarding linear compensator in a matching gold finish. Capacity is 20+1 with the included Magpul PMAG GEN M3 magazine.
Controls and shooting interface are thoughtfully upgraded: an ambidextrous charging handle and ambidextrous safety selector provide versatility, while the flat-faced trigger shoe promotes a consistent press. An SB Tactical adjustable arm brace and DFCO polymer pistol grip round out a stable, ergonomic setup.
The Aero ATLAS R-ONE aluminum handguard is free-floated with M-LOK slots and a Picatinny top rail, offering extensive mounting flexibility. A DFCO low-profile M-LOK hand stop is installed for positive hand placement. A polymer ejection-port cover and a carbine-length receiver extension (green anodized) are also fitted.
Standout finishes and components elevate this pistol. The MAS Defense gold TiN bolt carrier group adds both durability and visual contrast, complementing the two-tone Cerakote-style finish: bronze/brown receivers with an OD green handguard and receiver extension. No iron sights are installed. Made in the United States.