Alexander Arms APF-15 .50 Beowulf Semi-Auto AR-15 Rifle, Custom Build, 16" Barrel
This custom-assembled Alexander Arms APF-15 pairs a forged APF-15 lower with a direct-impingement upper chambered in the hard-hitting .50 Beowulf cartridge. A 16-inch threaded barrel, a free-float 15-inch M-LOK handguard, and a large spiral-fluted muzzle brake give this rifle recoil control and accessory versatility that stand out to both shooters and collectors.
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: Only a few light handling marks are visible on the receivers, and the bore remains bright and clean.
What’s Included
- 1× 10-round steel .50 Beowulf magazine
- Harris-style Picatinny clamp bipod (installed)
- Polymer M-LOK vertical foregrip (installed)
The rifle starts with an APF-15 lower receiver marked “CAL MULTI,” forged from 7075-T6 aluminum and finished in black hard-coat anodizing. Alexander Arms’ .50 Beowulf upper shows the caliber-swap flexibility of the AR-15 platform while providing impressive terminal performance.
A free-float 15-inch aluminum M-LOK handguard offers ample rail space for lights, lasers, or additional accessories. The Picatinny top rail runs the full length of the receiver and handguard, allowing easy optic mounting.
The 16-inch barrel is threaded 49/64-20 RH and fitted with a spiral-fluted muzzle brake that helps tame the substantial recoil of .50 Beowulf. The barrel remains compatible with other muzzle devices thanks to the standard thread pattern.
Furniture includes a 6-position collapsible stock, an A2-style polymer pistol grip, and a right-hand safety selector. A detachable Harris-style bipod and vertical foregrip are already installed, adding field stability and control straight out of the case.