Aero Precision Model X15 .300 AAC Blackout AR-15 Semi-Auto Rifle, 16 Inch, AAC Upper, Free-Float Handguard, Magpul Stock
This custom AR-15 pattern rifle is assembled with an Aero Precision Model X15 lower and an Advanced Armament Corp flat-top upper chambered in .300 AAC Blackout. It features a 16-inch threaded barrel, a free-float aluminum handguard with a full-length top rail, and a standard, non-QD three-port muzzle brake secured with a knurled jam nut. Magpul furniture and a matte black finish complete a clean, purpose-built configuration with 30+1 capacity.
The AAC-marked .300 BLK upper includes a forward assist, shell deflector, and ejection-port cover, while the Aero Precision X15 lower is marked CAL MULTI. A collapsible carbine receiver extension and low-profile gas block support reliable, direct-impingement operation. No fixed sights are installed, leaving the flat-top rail ready for the optic of your choice.
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: Minor scratches and blemishes are present on exterior surfaces.
What’s Included
- Aero Precision Model X15 .300 AAC Blackout semi-automatic rifle
- 1x 30-round Magpul PMAG Gen M2 MOE polymer magazine (marked 5.56x45)
This build combines an Aero Precision Model X15 lower with an Advanced Armament Corp .300 AAC Blackout flat-top upper. The upper is equipped with a forward assist, shell deflector, and ejection-port cover, and is clearly marked for .300 AAC Blackout. The lower is marked CAL MULTI and uses the standard AR-15/STANAG magazine interface.
The 16-inch barrel is threaded and fitted with a standard, non-QD three-port muzzle brake secured with a knurled jam nut. A low-profile gas block resides under the free-float aluminum handguard, which includes a full-length 12 o'clock Picatinny rail and lightening ports to reduce weight. The flat-top receiver provides straightforward mounting for optics and accessories.
Magpul furniture includes an adjustable, collapsible stock and a polymer pistol grip. The collapsible carbine receiver extension is secured with a castle nut, and the stated length-of-pull range is approximately 12 to 14.5 inches. The rifle carries a matte black finish across the receivers and furniture for a uniform appearance.
Chambered in .300 AAC Blackout (7.62x35mm), this direct-impingement semi-automatic platform offers a maximum capacity of 30+1. No fixed sights are installed, giving you flexibility to configure the top rail to your needs.